Practice your basic math skills with decimal practice questions.

** **

**1. 2.4 + 3.9 =**

a. 6.3

b. 7.3

c. 5.3

d. 6.13

**2. 3.34 + 2.13**

a. 54.7

b. 5.57

c. 5.47

d. 54.7

**3. 6.363 – 1.602**

a. 4.011

b. 4.761

c. 47.61

d. 3.761

**4. 3.57 – 3.21**

a. 03.6

b. 0.036

c. 0.36

d. 0.136

**5. Convert 4.358 to percent**

a. 435.8%

b. 43.58%

c. 4.358%

d. 4358%

6. Convert 1.21 to percent

a. 121%

b. 12.1%

c. 1.21%

d. 0.121%

**7. Convert 75% to decimal**

a. 0.0075

b. 0.075

c. 0.75

d. 7.5

**8. Convert 39% to decimal**

a. 0.49

b. 0.039

c. 3.9

d. 0.39

**Answer Key**

**1. A**

2.4 + 3.9 = 6.3

**2. C**

3.34 + 2.13 = 5.47

**3. B**

6.363 – 1.602 = 4.761

**4. C
**3.57 – 3.21 = 0.36

**5. A**

To convert to percent, simply multiply the decimal by 100 or move the decimal point 2 places to the right. Therefore, 4.358 x 100 = 435.8%

**6. A**

To convert to percent, simply multiply the decimal by 100 or move the decimal point 2 places to the right. Therefore, 1.21 x 100 = 121%

**7. C**

To convert percent to decimal, simply divide the decimal by 100 or move the decimal point 2 places to the left. Therefore, 75 ÷ 100 = 0.75

**8. D**

To convert percent to decimal, simply divide the decimal by 100 or move the decimal point 2 places to the left. Therefore, 39 ÷ 100 = 0.39

Written by:

**Modified: ** October 2nd, 2017

**Published: ** May 13th, 2014

In regards to the answer key

1. A 6.3 (B is 7.3)

In regards to the answers for the question

8. A and D are the same

Question 1 is correct – A – 2.4 + 3.9 = 6.3