Math Software Online: MathScore.com
 
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Mental Addition and Subtraction to 100 - 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=40, Mode=add

Add.

1.   12 + 10 =
2.   29 + 10 =

Complexity=90, Mode=add

Add.

1.   27 + 10 =
2.   77 + 10 =

Complexity=40, Mode=sub

Subtract.

1.   13 - 10 =
2.   36 - 10 =

Complexity=90, Mode=sub

Subtract.

1.   34 - 10 =
2.   82 - 10 =

Complexity=40

Add or subtract.

1.   21 - 10 =
2.   15 - 10 =

Complexity=90

Add or subtract.

1.   76 + 10 =
2.   27 - 10 =

Answers


Complexity=40, Mode=add

Add.

#Correct AnswerYour Answer
112 + 10 =
Solution
#Correct AnswerYour Answer
229 + 10 =
Solution

Complexity=90, Mode=add

Add.

#Correct AnswerYour Answer
127 + 10 =
Solution
#Correct AnswerYour Answer
277 + 10 =
Solution

Complexity=40, Mode=sub

Subtract.

#Correct AnswerYour Answer
113 - 10 =
Solution
#Correct AnswerYour Answer
236 - 10 =
Solution

Complexity=90, Mode=sub

Subtract.

#Correct AnswerYour Answer
134 - 10 =
Solution
#Correct AnswerYour Answer
282 - 10 =
Solution

Complexity=40

Add or subtract.

#Correct AnswerYour Answer
121 - 10 =
Solution
#Correct AnswerYour Answer
215 - 10 =
Solution

Complexity=90

Add or subtract.

#Correct AnswerYour Answer
176 + 10 =
Solution
#Correct AnswerYour Answer
227 - 10 =
Solution
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