# Constructing Fractions

*Thursday 11/13/08*

### Do-now: Fractions in measurement review

For the area units that we used last week, we discovered that...1 white = 4 blues | 1 blue = 4 reds |
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- Fill in the following math sentences, using fractions:

1 blue = __ __ white | 1 red = __ __ blue | 1 red = __ __ white |
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- Write out in words how you would say each of the following:

a) 5/8 red

b) 11/4 white

c) 2 3/7 blue

- Convert the following into whites. Your answer will be a fraction or mixed number.

a) 3 blues =

b) 1 white + 5 reds =

c) 2 whites + 3 blues + 1 red

### Constructing fractions

On these problems, a "blue" or a "red" is one of the boxes that the bar is divided into. Fill in the requested measurements, and then circle the one that is larger.- 1 3/4 blue or 2 3/8 red

- 5/8 red or 1/2 blue

- 3/8 red or 1/4 blue

- 7/8 blue or 1 1/4 red

- 3 1/4 red or 2 3/4 blue

- 1 1/2 blue or 1 7/8 red

- 2 3/8 red or 1 3/4 blue

- 1 7/8 red + 3/4 blue or 1 1/4 red + 1 1/8 blue

# Constructing Fractions Homework

- Circle all of the boxes below that are exactly five eighths full.

- Let's call the wide, narrow box in these pictures a "bar". Write in what measurement I am trying to show with each of the following:

- In the previous problem...

a) Compare and contrast the measurements shown in parts a and b.

b) Compare and contrast the measurements shown in parts c and d.

- Using the bar as a unit, draw each of the following measurements: