Add Decimals
Subtract Decimals
Review
Extras
Rounding/Estimating
100

Add.

8.7 + 3.7 =

12.4

100

Subtract.

6.9 - 5.1 =

1.8

100

Write this decimal as a fraction 

0.39

39/100

100

Mike has two pencils that he sharpened many times.  One pencil is 4.8 inches long, and the other pencil is 3.25 inches long.  How much longer is the first pencil that the second pencil?

1.55 inches

100

Round this decimal to the nearest WHOLE number. 

2.6

3

200

Add.

7.1 + 5.6=

12.7

200

Subtract. 

6.92 - 5.13 =

1.79

200

Order these decimals from least to greatest 


1.24

0.79

0.212

3.45

0.212

0.79

1.24

3.45

200

The fruit stand sold:

25.5 lbs. of apples,

16.25 lbs. of pears, and

17.373 lbs of oranges. 

How many pounds of fruit did they sell altogether?

59.123

200

Round this number to the nearest tenths. 

26.31

26.3

300

Add.

2.09 +  9.18=

11.27

300

Subtract.

89.3 - 4.9 =

84.4

300

What is the value of the digit 8 in this number


124,382,765

80,000

300

Sara bought a hot dog for $2.50 and a soda for $1.25 at the county fair.  She paid with a $10.00 bill.  How much change did she get back?

$6.25

300
ESTIMATE the sum.


358 + 293=

700

400

Add.

7.91 + 8.43 =

16.34

400

Subtract.

23.69 - 12.22

11.47

400

6 x 105

600,000

400

Jenna goes to the store to buy ingredients for a salad.  She buys lettuce for $4.45, carrots for $2.67, cucumber for $3.49, and dressing for $7.25.  What is the total cost of her salad?

$17.86

400

ESTIMATE THE SUM.

15.01  -  4.4 =

11

500

Add.

5.05 + 0.22 + 17.41 =

22.68

500

Subtract.

1.67 - 0.97

0.7

500

Round this number to the nearest tenth


425.762

425.8

500

Sam runs in four races.  The following are his times; 20.40 seconds, 18.36 seconds, 22.19 seconds, and 24.38 seconds.  Find the difference between his fastest and slowest time.

6.02 seconds

500

Estimate the difference.

22.4  -  16.2  =

5