Decimal Computation

Word Problems

100

2.569 

What digit is in the hundredths place?

6

200

15.209

What is the place value of the 2?

tenths

300

I bought a hamburger for $2.50 and fries for $1.25.  How much change did I spend?

$3.75

400

I bought 3 pencils that each cost $0.72. Then I paid with a $5 bill.  How much change did I get back?

$2.84

500

Mrs. Fox 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 evenly, how much will they each pay? 

$9.30 

Adding

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 science experiment, Mrs. Fox used 2.3g of sodium and 11.5g of chloride.  She also used 5.06g of water.  How many grams did she use in all?

18.86 grams

500

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

$62.92

Subtracting

100

I had $6.25 and lost $1.05.  How much is left?

$5.20

200

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

300

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

400

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

500

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

Multiplying

100

2 x 4.1

8.2

200

7 x 3.6

25.2

300

8.5 x 0.04

0.34

400

3.1 x 7.5

23.25

500

6.4 x 0.09

0.576

Dividing

100

5.5  / 5

1.1

200

4.12 / 2

2.06

300

3.4 / 5

0.68

400

51.6 / 0.2

258

500

3.84 / 0.3

12.8