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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdAbout
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AboutM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Jess is as tall as the metre ruler. She is about 1 metre tall.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdAdd mentally
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Add mentallyM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Add 58 and 8 mentally.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdAfter
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AfterM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Tuesday comes after Monday.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte Ltda.m.
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a.m.M
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Any time from midnight to before noon.
Example:
7.25 in the morning can also be written as 7.25 a.m.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdBar graph
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Bar graphM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
A bar graph uses bars instead of pictures or symbols to show data.
Example:
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdBefore
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BeforeM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Wednesday comes before Thursday.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdCalendar
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CalendarM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
A table or chart that shows the days of the week and months of the year.
Example:
This calendar is for the month of January in the year 2012.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdCarroll diagram
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Carroll diagramM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
A Carroll diagram helps us sort data in a ‘yes’ or ‘no’ manner. A simple Carroll diagram has two groups.
If the first group is labelled ‘A’, then the second group is usually labelled ‘Not A’.
![Page 17: Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd About](https://reader036.vdocuments.net/reader036/viewer/2022062516/56649e625503460f94b5e8f3/html5/thumbnails/17.jpg)
Carroll diagramM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
The Carroll diagram sorts the children according to whether they wear glasses.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdCentimetre (cm)
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Centimetre (cm)M
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
A unit of measurement for length.
Example:
The length from the 0 mark to the 1 mark on the ruler is 1 centimetre (or 1 cm).
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdCents (¢)
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Cents (¢)M
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
A unit of measurement for money.
Example:
The quarter has a value of 25 cents. We can also write it as 25¢.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdChange
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ChangeM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Tom buys a top that costs 45¢.
He will get back 30¢ in change if he pays the cashier 75¢.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdDivide
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DivideM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
We divide to share objects equally among groups or put objects into equal groups to find the number of groups. We use ÷ when we divide.
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DivideM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Share the storybooks equally between Tom and Ari.
Each boy gets 2 storybooks.
![Page 27: Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd About](https://reader036.vdocuments.net/reader036/viewer/2022062516/56649e625503460f94b5e8f3/html5/thumbnails/27.jpg)
Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdDivision sentence
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Division sentenceM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
‘4 ÷ 2 = 2’ is a division sentence. We read this as ‘4 divided by 2 equals 2’.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdDollars ($)
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Dollars ($)M
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
A unit of measurement for money.
Example:
This note has a value of 10 dollars. We can also write it as $10.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdDouble
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DoubleM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
When we find the double of a number, we add the number to itself.
Example:
Double of 20 = 20 + 20So, double of 20 = 40.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdEarlier
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EarlierM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
2.10 p.m. is 30 minutes earlier than 2.40 p.m.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdGram (g)
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Gram (g)M
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
A unit of measurement for mass.
Example:
The mass of the sweet is 5 grams (or 5 g).
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdHalf
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HalfM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
When we find half of a number, we divide the number by 2.
Example:
24 ÷ 2 = 12So, half of 24 is 12.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdHalf litre ( l)2
1
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte Ltd
Half litre ( l)12
A unit of measurement for capacity.
Example:
The capacity of the vase is half litre (or l).21
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdHeavier
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HeavierM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
The pineapple is heavier than the papaya.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdHeaviest
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HeaviestM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
The watermelon is the heaviest.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdKilograms (kg)
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Kilograms (kg)M
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
A unit of measurement for mass.
Example:
The mass of the bag of sugar is 1 kilogram (or 1 kg).
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdLater
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LaterM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
10.20 a.m. is 1 hour later than 9.20 a.m.
1 hr later
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdLess than
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Less thanM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
The stool is shorter than the metre ruler. It is less than 1 metre tall.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdLighter
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LighterM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
The tennis ball is lighter than the basketball.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdLightest
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LightestM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
The beach ball is the lightest.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdLitre (l)
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Litre (l)M
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
A unit of measurement for capacity.
Example:
This is a 1 litre (or 1 l) measuring jug.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdLonger
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LongerM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Pencil B is longer than Pencil A.
Pencil C
Pencil B
Pencil A
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdLongest
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LongestM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Pencil C is the longest.
Pencil C
Pencil B
Pencil A
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdMetre (m)
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Metre (m)M
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
A unit of measurement for length.
Example:
The ruler is 1 metre (or 1 m) long.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdMidnight
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MidnightM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
The end of one day and the start of the next.
Example:
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdMore than
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More thanM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
The teacher is taller than the metre ruler.She is more than 1 metre tall.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdMultiples
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MultiplesM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
When any number is multiplied by 2, the answer is a multiple of 2.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte Ltd
Multiplication sentence
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Multiplication sentenceM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
‘2 × 4 = 8’ is a multiplication sentence. We read this as ‘2 times 4 equals 8’.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdMultiply
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MultiplyM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
When we add equal groups together, we are multiplying. We use × when we multiply.
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MultiplyM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
We can multiply to find out how many apples there are.
2 groups of 4 = 8 2 × 4 = 8
There are 8 apples altogether.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdNoon
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NoonM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Middle of the day.
Example:
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdNote
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NoteM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
This is a one dollar ($1) note. It has two sides – front and back.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdNumber bond
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Number bondM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
A number bond shows the parts that make up the whole.
Example:
2 and 5 make 7.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte Ltdp.m.
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p.m.M
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Any time from noon to before midnight.
Example:
7.25 in the evening can also be written as 7.25 p.m.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte Ltd
Repeated addition
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Repeated additionM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
We can use repeated addition to find out how many ducklings there are in 3 groups of 2.
3 groups of 2 = 2 + 2 + 2= 6
There are 6 ducklings in 3 groups of 2.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdScale
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ScaleM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Measurements marked at regular intervals on a graph.
Example:
Scale
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdShorter
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ShorterM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Crayon C is shorter than Crayon A.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdShortest
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ShortestM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Crayon B is the shortest.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte Ltd
Subtract mentally
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Subtract mentallyM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Subtract 4 from 46 mentally.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdTaller
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TallerM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Giraffe B is taller than Giraffe A.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdTallest
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TallestM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
Giraffe C is the tallest.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdTimetable
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TimetableM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
Example:
This is a weekly timetable.
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Maths SM
ART Grade 2 ©
2012 Alston Publishing House Pte LtdWeighing scale
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Weighing scaleM
aths SMART G
rade 2 © 2012 Alston Publishing H
ouse Pte Ltd
A scale that measures the masses of objects.
Example:
We can read the mass of the notebook by looking at the markings on the weighing scale. The red pointer is at 100. So, the mass of the notebook is 100 g.