Practice Decimals in Math

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

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+0.7.

Example 2

medium
Compute 7.2÷0.4.

Example 3

hard
Order from least to greatest: 0.305, 0.35, 0.3, 0.3055.

Example 4

medium
Compute 0.25×8.

Example 5

easy
Which is bigger: 0.4 or 0.39?

Example 6

easy
Compute 0.9−0.4.

Example 7

medium
Estimate: 4.9×5.1 by rounding both factors.

Example 8

easy
Round 3.47 to the nearest tenth.

Example 9

medium
Convert 0.85 to a fraction in simplest form.

Example 10

challenge
Which is bigger: 23 or 0.67?

Example 11

challenge
Express 0.142857‾ as a fraction. (Hint: it's a well-known repeating decimal.)

Example 12

medium
Compute 0.001×1000.

Example 13

challenge
Without a calculator, compute 1.5×2.4.

Example 14

hard
A board is 2.4 m long. It is cut into pieces of 0.3 m. How many pieces and how much is left?

Example 15

medium
Compute 4.5×0.2 and explain the decimal placement.

Example 16

hard
Compute 0.045×200.

Example 17

easy
Write 0.5 as a fraction in simplest form.

Example 18

medium
Write 34 as a decimal.

Example 19

easy
Compute 0.1×10.

Example 20

medium
Compute 0.4×0.6.