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