copyright ©, long beach unified school district. all rights reserved. - grade 3 1 grade 3 map 2 d...

Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 31

Grade 3 MAP2D

Trimester 1Instructional Strategies

Aligned to the 1997California Content Standards


addadditionsumtotalplusin allin addition toincreased byenlarged by

PROBLEM SOLVING WORDSsubtractsubtraction less than

minus take away

decreased bydiminished byreduced byHow many more than?How many fewer than?How many left?

multiplymultiplied bytimesofbyproductatgroups ofeach every

divideintoquotientperpartsdistributed amongHow much for each?How many groups?

fractionseachevery

fewer thandifferencedroppedloss of

gainrosegreater thancombinetogether


Problem Solving Strategy “U-P-S”

U

P

S

Understand: Read the problem and think about the question. Each word is important. Missing a word or reading it incorrectly could cause you to get the wrong answer.

Plan: Think about how you can solve the problem. Look for key words and numbers. What do you need to do first? What do you need to do next?

Solve: Follow your plan, working logically and carefully. Make sure you solved all steps needed to answer the problem. Be sure you answered the question asked.


MAP2D

SBA #1

Place Value


Let’s Find Place Value to 10,000

thousands hundreds tens ones

Write a number in the place value chart to find the value of each digit in a number.

Chapter 1 Lesson 3

TH H T O

3 0 5 1

3 0 0 0

Example:

“What is the value of the three in the number three thousand fifty-one” ?

Answer: 3000


Let’s Write Numbers in Different Ways thousands hundreds tens ones

5 6 4 5

Write the number 5,645 in expanded form.

Chapter 1 Lesson 4

TH H T O


Let’s Write Numbers in Different Waysthousands hundreds tens ones

5 6 4 5

Write the number 5,645 in expanded form.

Chapter 1 Lesson 4

5,000 + 600 + 40 + 5

5 6 4 5

5 0 0 0

6 0 0

4 0

5



5 6 4 5

Write the expanded form in vertical/working form

5,000

600

40

+ 5

5,645Chapter 1 Lesson 4

Write 5,000 + 600 + 40 + 5 in Standard Form.



5 6 4 5

Write in 5,000 + 600 + 40 + 5 in Standard Form.

Write the expanded form in vertical/working form

5,000

0,600 Fill in the spaces with zeros.

+ 0,040

0,005

5,645 Now you have the standard form.

Chapter 1 Lesson 4


Let’s Compare Numbers

Line up the numbers vertically 25 3530 32

Start at the left to compare digits in the greatest place first. Highlight the digits in the first vertical column where the digits are different.

③ Now compare these highlighted digits to compare the value.

We can compare numbers using >, < and = signs.

Chapter 2Lesson 1

25 26 27 28 29 30 31 32 33 34 35

25 < 30 35 > 32

25 30 35 32


Let’s Order Numbers

Line up the numbers vertically.

7,8937,0807,870

Start at the left to compare digits in the greatest place first. Highlight the digits in the first vertical column where the digits are different. Continue moving to the next column.

We can compare a set of numbers by ordering them from least to greatest.

7,893 7,080, 7,870

Chapter 2Lesson 2

greatest

middle

least7,893

7,870

7,080 7,870 7,893

Now compare these highlighted digits to compare the value.


Let’s Round Numbers!Long Beach Lifeguards reported to the Press Telegram that there were 2,857 people at the beach on Sunday. Round this to the nearest __________

Underline the word that comes after “nearest”. Underline the digit in the indicated place.

If the circled digit is 5 or greater, add one to the underlined place and change all digits to the right to zeros.

Circle the digit to the right of the underlined place.

If the circled digit is 4 or less, keep the underlined place and change all digits to the right to zeros.Chapter 2

Lesson 4


Let’s Round Numbers!Example: What is 5,638 rounded to the nearest thousand?

5,000 6,0005,638

On the number line, 5,638 is between 5,000 and 46,000 but is closer to 6,000.

5, 6 38 6,000Ch 2 L 6

5,5004 or less, stays the same

5 or higher, add one more


MAP2D

SBA #2

Addition and Subtraction


Let’s Solve Algebra Equations !

To solve an equation, both sides of the equal sign need to be the same.

Hint: Think of a balance

17 + 8 = + 12

25 = + 12 What is the difference between 25 and 12?

25 - 12

13 25 = 13 + 12

Chapter 3 Lesson 2


Subtraction with Regrouping

Start in the ones column with the top number and ask, “Is the number greater or equal to the number below?” If your answer is “yes”, then begin subtracting.

H TO

245 - 124

121Chapter 4Lesson 2

Check with addition….

121+124 245


Subtraction with Regrouping

If your answer is “No”, then regroup the tens to add to the ones.

H T O

2 8 3 - 1 5 4

“Always ask yourself, “Do I need to regroup?”

7 13

921

10 ones plus 3 ones

Chapter 4Lesson 4

Check with addition….

1 129+154 283


Making Change

Chapter 22Lesson 2

Trevor has $5.00 to buy a new book that costs $4.75. How much change should he get back?

U – How much change should he get back?

P – “change”, - , $5.00, $4.75

S - $5.00 - $4.75 =

$5.00

- $4.75

$0.25 or 25¢

Use the UPS

Strategy

4 10 109


Let’s Find Patterns

Subtract to find the difference between two “neighbors” in the pattern.

30 – 25 = 5 35 – 30 = 5

Then use this difference ( 5 ) to find the missing number in the pattern.

45 – 5 = 40

The pattern is 25, 30, 35, 40, 45, 50

25, 30, 35, __, 45, 50

Chapter 4Lesson 7


MAP2D

SBA #3

Multiplication


Let’s Solve for Missing Factors !

To solve an equation, both sides of the equal sign need to be the same. 9 × d = 20 + 7

9 × d = 2 7

9 × d = 20 + 7

Chapter 8 Lesson 2


Think 9 × what = 27?

9 × 3 = 27Think nine groups of

what = 27?

9 × 3 = 2 7


What is the missing number?

To solve an equation, both sides of the equal sign need to be the same.


12 x ( 6 x 3 ) = (3 x __ ) x 12

If we have a 12, 6, and 3 on one side of the equal sign, we need to have a 12, 6, and 3 on the other side. The missing factor then is 6.

12 x ( 6 x 3 ) = (3 x 6 ) x 12 216 = 216

Associative Property of Multiplication: Changing the way in which the factors are grouped does not change the product.Chapter 8Lesson 4


Let’s Choose the Operation Symbol

Look at the numbers on the side of the equation with the missing operation sign.

If the numbers are smaller than the given answer you must add or multiply to get the larger answer.

Ask yourself does 9 + 5 = 45? No

Ask yourself does 9 x 5 = 45? Yes

The missing operation symbol is multiplication ( x )

9 5 = 45

It’s All About the Facts(+,-,x,÷)


Ch 8 L 1

Number of Teams

Numbers of Players

1 5 2 10 3 15

Find the RuleThe table shows the number of players needed for different number of teams.

If each team has the same number of players, how many players are needed for 5 teams?

Think: What

operation makes

numbers greater?

+ and ×

Think…… 1 +__ = 5, so…. 1 + 4 = 5, rule is +4…try it!

Does 2 + 4 = 10?, no

Think….. 1 x ___ = 5, so….1 x 5 = 5, rule is x 5…try it!

Does 2 x 5 = 10? Yes,

Does 3 x 5 = 15? Yes

The rule is x 5.

Answer the question: How many players are needed for 5 teams? 5 x 5 = 25. 25 players

Hint: Look at the numbers!

Is there a pattern? Are the numbers getting bigger

or smaller?

copyright ©, long beach unified school district. all rights reserved. - grade 3 1 grade 3 map 2 d...

Documents

long beach lifeguards

place value slide

thhto slide

round numbers

numbers vertically2535

set of numbers

greatest place

expanded form