Practice Decimals in Math

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

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Quick Recap

Numbers written with a decimal point where each position to the right represents tenths, hundredths, thousandths, etc.

Money uses decimals: \$3.50 means 3 dollars and 50 cents (half a dollar).

Showing a random 20 of 50 problems.

Example 1

easy
Compute 0.2+0.70.2 + 0.7.

Example 2

medium
Compute 7.2÷0.47.2 \div 0.4.

Example 3

hard
Order from least to greatest: 0.3050.305, 0.350.35, 0.30.3, 0.30550.3055.

Example 4

medium
Compute 0.25×80.25 \times 8.

Example 5

easy
Which is bigger: 0.40.4 or 0.390.39?

Example 6

easy
Compute 0.9−0.40.9 - 0.4.

Example 7

medium
Estimate: 4.9×5.14.9 \times 5.1 by rounding both factors.

Example 8

easy
Round 3.473.47 to the nearest tenth.

Example 9

medium
Convert 0.850.85 to a fraction in simplest form.

Example 10

challenge
Which is bigger: 23\frac{2}{3} or 0.670.67?

Example 11

challenge
Express 0.142857‾0.\overline{142857} as a fraction. (Hint: it's a well-known repeating decimal.)

Example 12

medium
Compute 0.001×10000.001 \times 1000.

Example 13

challenge
Without a calculator, compute 1.5×2.41.5 \times 2.4.

Example 14

hard
A board is 2.42.4 m long. It is cut into pieces of 0.30.3 m. How many pieces and how much is left?

Example 15

medium
Compute 4.5×0.24.5 \times 0.2 and explain the decimal placement.

Example 16

hard
Compute 0.045×2000.045 \times 200.

Example 17

easy
Write 0.50.5 as a fraction in simplest form.

Example 18

medium
Write 34\frac{3}{4} as a decimal.

Example 19

easy
Compute 0.1×100.1 \times 10.

Example 20

medium
Compute 0.4×0.60.4 \times 0.6.
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