Operations with Decimals

Adding Decimals

100

Add these decimals: 21.74 + 8.27

30.01

200

Add these decimals: 5.2 + 3.11

8.31

300

Add these decimals: 6.125 + 18.4729

24.5979

400

Add these decimals: 17 + 9.54

26.54

500

Add these decimals: 4.67 + 29.1

33.77

Subtracting Decimals

100

Subtract these decimals: 851.701 - 312.49

539.211

200

Subtract these decimals: 10.71 - 0.7

10.01

300

Subtract these decimals: 547.612 - 3.107

544.505

400

Subtract these decimals: 9.034 - 0.095

8.939

500

Subtract these decimals: 1.72 - 0.8

0.92

Multiplying Decimals

100

Multiply these decimals: 0.12 x 7

0.84

200

Multiply 4.4 x 5.3 =

23.32

300

Multiply these decimals: 1.83 x 0.3

0.549

400

Multiply these decimals.  12.7 x 2.6 =

33.02

500

Multiply these decimals: 1.246 x 3.4

4.2364

Powers of 10

100

Multiply these numbers: 7.6 * 100

760

200

Divide 0.5 by 100

0.005

300

What is 0.3km to m? (hint: *1000)

300m

400

Sally has 100 piggy banks (for some reason). Each piggy bank has $50.12 in it (for some reason). How much money does Sally have?

$5012.00

500

What is 1000 times 3.14159?

3141.59

Final Jeopardy

100

Do this operation chain: Start with 12.2, divide by 2, multiply by 3, add 3.14, divide by 2, and subtract 2.1

8.62