Operations with Decimals

Random

200

In what year was the first Pokemon card released?

October 20th, 1996

400

There are about 8 billion humans on Earth. About how many Elephants are left in the world?

415,000

600

What was the approximate lifespan of a Tyrannosaurus Rex?

28 years

800

The Earth's circumference is 24,000 or 2.4 x 10⁴ miles. Estimate the Sun's diameter.

2,700,000 or 2.7 x 10⁶ miles

1000

Approximately how many cells are in the human body

30,000,000,000,000 or 3 x 10¹³

Multiplying/Dividing by Base 10

200

12.1 x 100

1,210

400

95.63 x 1000 =

95,630

600

52.1 ÷ 100 =

.521

800

3,201.3 ÷ 10⁴

.32013

1000

.01 x 5.42 x 10³ x 2 =

108.4

Adding Decimals

200

Add these decimals: 21.74 + 8.26

30

400

Add these decimals: 5.2 + 3.11

8.31

600

Add these decimals: 6.125 + 18.4729

24.5979

800

Add these decimals: .32 + 17.1 + 9.54 +

26.96

1000

Add these decimals: 4.67 + 29.1 + 5.33

39.1

Multiplying Decimals

200

Multiply these decimals: 0.2 * 7

1.4

400

Multiply 4.4 * 5.3 =

23.32

600

Multiply these decimals: 0.8 * 0.3

0.24

800

Multiply these decimals.  12.7 x 26 x .5 =

165.1

1000

Multiply these decimals. 0.25 x 0.7 x 4.16

.728

Subtracting Decimals

200

Subtract these decimals: 851.701 - 312.49

539.211

400

Subtract these decimals: 10.71 - 0.7

10.01

600

Subtract these decimals: 547.612 - 3.107

544.505

800

Subtract these decimals: 9.034 - 0.095

8.939

1000

Subtract these decimals: 1.72 - 0.8

0.92

DividingDecimals

200

Divide these decimals: 0.27 ÷ .03 

9

400

Divide these decimals: 60.5 ÷ 5

12.1

600

Divide these decimals: 1.26 ÷ 0.3

4.2

800

Divide these decimals: 2.12 ÷ 0.05 

42.4

1000

Divide these decimals: 4.16 ÷  1.6

2.6