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Mental Addition and Subtraction - Sample Math Practice Problems

The math problems below can be generated by MathScore.com, a math practice program for schools and individual families. References to complexity and mode refer to the overall difficulty of the problems as they appear in the main program. In the main program, all problems are automatically graded and the difficulty adapts dynamically based on performance. Answers to these sample questions appear at the bottom of the page. This page does not grade your responses.

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Complexity=500, Mode=add

Add.
1.   133 + 100 = 2.   462 + 100 =

Complexity=900, Mode=add

Add.
1.   653 + 100 = 2.   307 + 10 =

Complexity=500, Mode=sub

Subtract.
1.   212 - 100 = 2.   418 - 100 =

Complexity=900, Mode=sub

Subtract.
1.   542 - 10 = 2.   221 - 100 =

Complexity=500

Add or subtract.
1.   217 - 100 = 2.   388 - 100 =

Complexity=900

Add or subtract.
1.   274 + 10 = 2.   855 + 100 =

Answers

Complexity=500, Mode=add

Add.
#Correct AnswerYour Answer
1133 + 100 =
Solution
#Correct AnswerYour Answer
2462 + 100 =
Solution

Complexity=900, Mode=add

Add.
#Correct AnswerYour Answer
1653 + 100 =
Solution
#Correct AnswerYour Answer
2307 + 10 =
Solution

Complexity=500, Mode=sub

Subtract.
#Correct AnswerYour Answer
1212 - 100 =
Solution
#Correct AnswerYour Answer
2418 - 100 =
Solution

Complexity=900, Mode=sub

Subtract.
#Correct AnswerYour Answer
1542 - 10 =
Solution
#Correct AnswerYour Answer
2221 - 100 =
Solution

Complexity=500

Add or subtract.
#Correct AnswerYour Answer
1217 - 100 =
Solution
#Correct AnswerYour Answer
2388 - 100 =
Solution

Complexity=900

Add or subtract.
#Correct AnswerYour Answer
1274 + 10 =
Solution
#Correct AnswerYour Answer
2855 + 100 =
Solution
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