Decimal Computation

Place Value/Word Problems

100

2.569 

What digit is in the hundredths place?

6

200

15.209

What is the value of the 2?

two tenths or 0.2

300

867.957

What is the value of the 5. 

Five Hundredths

400

63.897

What place is the 8 in? 

Tenths

500

7856.927

What are the places and values of the 7. 

Thousands 7,000

Thousandths 0.007

Adding Decimals

100

3.45 + 2.78 = ______

6.23

200

6.09 + 4.3 = 

10.39

300

7.125 + 1.86 = 

8.985

400

9.5 + 0.47 = 

9.97

500

2.804 + 3.96 = 

6.764

Subtracting Decimals

100

8.72 − 3.4 = 

5.32

200

5.6 − 2.89 = 

2.71

300

10.0 − 6.375 = 

3.625

400

7.21 − 4.8 = 

2.41

500

9.005 − 2.67 = 

6.335

Word Problems

100

I bought a hot dog for $3.50 and a drink for $1.25.  How much did I spend?

$4.75

200

I got a piece of fabric that was 0.8 yards and a piece that was 1.3 yards.  How much did I buy in all?

2.1 yards

300

I bought a backpack for $22 and a pencil pouch for $3.75.  How much did I spend?

$25.75

400

In his chemistry experiment, Mr. Hu used 2.3 g of sodium and 11.5 g of choloride.  He also used 5.06 grams of water.  How many grams did he use in all?

18.86

500

What is the total of $52, $6.03, $4, and $0.89?  Tax is included?

$62.92

Word Problems

100

I bought 5.7 yards of pink fabric and 2.4 yards of blue.  How much longer is the pink fabric than the blue?

3.3

200

I need a piece of wood that is 6.5 inches long.  Someone gave me a piece that was 12.0 inches long. How much do I need to cut off to have the right size?

5.5 inches

300

My bill at the restaurant was $11.78.  If I paid with a $20 bill, how much change would I get back if tax was included?

$8.22

400

There are 6.3 oz of juice left in the jug.  If there were originally 16 oz, how much did I drink?

9.7 oz

500

Mrs. Hu went to dinner with 2 friends.  She ordered spaghetti for $8.95, one friend ordered chicken for $6.55, and the other friend ordered steak for $12.40.  If they split the bill, how much will they each pay? 

$9.30