Download presentation

Presentation is loading. Please wait.

1
**Picture this! Dividing by fractions**

solving 1¾ ÷ ½ with Pattern Blocks

2
**Get out the pattern blocks**

We’ll use them to build 1 ¾ ÷ ½ and find out the answer

3
**1 ¾ We have to build 1¾ 1¾ is a mixed number with a whole number part**

1 plus a fraction part

4
**There’s a 4 in the denominator (fourths),**

1¾ so we’ll need to build something that can be covered by 4 equal, smaller things.

5
**Since each blue rhombus is exactly covered by 2 triangles**

6
**2 blue rhombi will be exactly covered by 4 triangles**

7
**So let’s put 2 blue rhombi together and call it 1.**

8
**Since 4 green equilateral triangles cover it exactly, we can call it 4/4 (four fourths)**

4/4 = 1 whole

9
**A trapezoid covers that**

Now we have to build ¾ 4/4 is so ¾ means 3 triangles A trapezoid covers that

10
So now we have 1¾ 1 1 Dividing it by ½ is the same thing as saying, “How many ½ blocks cover it?”

11
What’s a ½ block? 1 whole is so ½ must be

12
**How many ½ blocks does it take to cover 1 ¾ ?**

so 1¾ ÷ ½ = 3 with a triangle left over

13
**What about the leftover?**

What part of a ½ block is that leftover triangle?

14
**2 triangles cover the blue rhombus.**

So the leftover triangle is ½ of the rhombus. = ½ of

15
goes into 1 ¾ 3½ times

16
1¾ ÷ ½ = 3 ½

Similar presentations

OK

Fraction Division: A Whole Number Divided by a Fraction 1 = ? 1515 To get the answer, ask: 1 ? = 1515 How many groups of can be made from 1? 1515.

Fraction Division: A Whole Number Divided by a Fraction 1 = ? 1515 To get the answer, ask: 1 ? = 1515 How many groups of can be made from 1? 1515.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on barack obama leadership characteristics Ppt on earth and space facts Ppt on advanced bluetooth technology Ppt on van de graaff generator belts Ppt on e-commerce websites Ppt on healthy eating habits Ppt on different types of trees Ppt on mobile computing from iit bombay Ppt on job satisfaction of employees Ppt on oxidation and reduction reactions