Estimating Fractions with Benchmarks

Is the following fraction closest to 0, ½, or 1 whole?

3/10

• Zero

• ½

• 1

Is the following fraction closest to 0, ½, or 1 whole?

5/6

• 0

• ½

• 1

Is the following fraction closest to 0, ½, or 1 whole?

1/10

• 0

• ½

• 1

Is the following fraction closest to 0, ½, or 1 whole?

2/4

• 0

• ½

• 1

Is the following fraction closest to 0, ½, or 1 whole?

⅝

• 0

• ½

• 1

Is the following fraction closest to 0, ½, or 1 whole?

4/5

• 0

• ½

• 1

Is the following fraction closest to 0, ½, or 1 whole?

2/9

• 0

• ½

• 1

Is the following fraction closest to 0, ½, or 1 whole?

2/12

• 0

• ½

• 1

A cabinet maker cut 7/16 inch off a board that was 2 7/8 inches long.What is the new length of the board?

• 2 7/16

• 2 6/8

• 1 15/16

• 3 5/16

A cabinet maker cut 7/16 inch off a board that was 2 7/8 inches long. How would you rewrite this using benchmark fractions to prove your answer is reasonable?

• 3 - 1 = 2

• 1/2 + 2 1/2 = 3

• 3 - 1/2 = 2 1/2

• 4 - 1 = 3