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Mental Math Practice Answers
Addition Practice Problems:
1. 59
2. 195
3. 1,801
4. 9.6
5. 23
6. 5/8
7. 4√3 + 2√2
8. 4.73
9. -2.3
10. 15,678
Subtraction Practice Problems:
1. 49
2. 128
3. 632
4. 5.2
5. -35
6. 1/8
7. 11√2 - 5√15
8. 2.35
9. 1.4
10. 20,124
Multiplication Practice Problems:
1. 48
2. 325
3. 560,088
4. 4.05
5. -30
6. 1/2
7. 4√10 - 5√2 - 3√5 + 5
8. 8.0
9. 3.9
10. 2,300
Division Practice Problems:
1. 8
2. 18
3. 96
4. 3.0
5. -10
6. 16/15
7. √5 + 1
8. 3.0
9. 6.0
10. 1,500
Percentage Practice Problems:
1. 30
2. 20%
3. 30%
4. 80%
5. 1
6. $84
7. 75%
8. $40
9. 30%
10. 80%
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