I can make reasonable estimates to a situation using whole numbers and fractions.

Rachel A. Darnell

To estimate a fraction, you must decide one of the following.

IS THE FRACTION CLOSEST TO IS THE FRACTION CLOSEST TO 0 OR 1/2 OR 10 OR 1/2 OR 1

SOMETIMES A PICTURE HELPSSOMETIMES A PICTURE HELPS

56 3

11 13

78

25

18 10

111012

4/12 should be rounded to _________

6/7 should be rounded to _________

0 11/2

Round each fraction to 0 or 1/2 or 1

0 1

1/2

6/10 should be rounded to _________ 0 11/2 1/2

1

0 11/21/12 should be rounded to _________ 0

Round a fraction to 0 or 1/2 or 1

2/12 should be rounded to _________

0 11/2

0

2 10/12 should be rounded to _________ 3

Janice had 7 and 3/4 cups of flour in a container. She used 3 and 1/4 cups to make cookies. About how much did she have

LEFT in the container after making cookies?

Step 1 - Round the mixed numbers to the nearest whole number.

Step 2 - Decide on an operation

Step 3 - Do the computation

Step 4 - Subtract using the real numbers.

Step 5 - Compare your real answer with the estimate and decide if it is reasonable.

7 3/4 rounds to

3 1/4 rounds to

SUBTRACT

8 - 3 = 5 cups of flour

7 3/4 - 3 1/4 = 4 2/4 or 4 and a half cups of flour

REASONABLE

8 3

Three friends had a slumber party. Greg ate 3 and 1/8 candy bars, Brad

ate 2 and 6/8 candy bars and Warren ate 1 and 7/8 candy bars. About how many candy bars did

they eat altogether?Step 1 - Round the mixed numbers to the nearest whole number

Step 2 - Decide on an operation

Step 3 - Do the computation

Step 4 - Add using the real numbers.

Step 5 - Compare your real answer with the estimate and decide if it is reasonable.

3 1/8 rounds to

2 6/8 rounds to

1 7/8 rounds to

ADD (why)

3 + 3 + 2 = 8 candy bars

3 1/8 + 1 7/8 = 5 5 + 2 6/8 = 7 6/8 candy bars

REASONABLE

3 3 2

Rememberyou estimate

should always be

__________________REASONABLEREASONABLE