partition a whole into equal parts and define the equal parts to identify the unit fraction...

Partition a whole into equal parts and define the equal parts to identify the unit fraction numerically.

Math Lesson 5.5I can look at different shapes, tell

what fraction they are divided into, and write the fraction as a number.

Skip Count!

Skip Count by 8s …

Starting when I say “GO,” skip count by 8s as high as you can in 90

seconds.

8 16 24 32 40 48 56 6472 80 88 96 104 112 120

Write the fractional unit

What fractional unit is the shape divided into?

Thirds

What fraction of the shape is shaded?

Write the fractional unit

What fractional unit is the shape divided into?

Fourths

What fraction of the shape is shaded?

Write the fractional unit

What fractional unit is the shape divided into?

Fifths

What fraction of the shape is shaded?

Write the fractional unit

What fractional unit is the shape divided into?

Sixths

What fraction of the shape is shaded?

Write the fractional unit

What fractional unit is the shape divided into?

Tenths

What fraction of the shape is shaded?

Write the fractional unit

What fractional unit is the shape divided into?

Eighths

What fraction of the shape is shaded?

Problem of the DayMrs. Lambrectsen cuts a 6-meter rope into equal size pieces to make her class jump ropes.

Mrs. Richardson cuts a 5-meter rope into three equal size pieces to make jump ropes for her class.

Which class has longer jump ropes?

Mrs. Lambrectsen’s class!

Concept DevelopmentWhisper the name of this shape.

Circle

Watch as I partition the whole circle into equal parts.

What is the name of each equal part?

1 half

Concept Development1 half is the unit form. This is how we write it numerically (with numbers): ½.½ is called the unit fraction.

Let’s ANALYZE shapes

This shape is divided into equal parts. What is the name of each unit?

1 thirdWrite the unit fraction for the shaded part on your white board and hold it up.

⅓

Let’s ANALYZE shapes

This shape is divided into equal parts. What is the name of each unit?

1 halfWrite the unit fraction for the shaded part on your white board and hold it up.

½

Let’s ANALYZE shapes

This shape is divided into equal parts. What is the name of each unit?

1 tenthWrite the unit fraction for the unshaded part on your white board and hold it up.

9/10

Let’s ANALYZE shapes

This shape is divided into equal parts. What is the name of each unit?

1 sixthWrite the unit fraction for the shaded part on your white board and hold it up.

⅚

Let’s ANALYZE shapes

This shape is divided into equal parts. What is the name of each unit?

1 fifthWrite the unit fraction for the shaded part on your white board and hold it up.

⅘

Let’s ANALYZE shapes

This shape is divided into equal parts. What is the name of each unit?

1 fifthWrite the unit fraction for the unshaded part on your white board and hold it up.

⅕

Let’s ANALYZE shapes

Discuss with your partner:Does this shape have equal parts?

No!Turn and talk: If the parts are not equal, can we call them fourths?

No!

Problem Set