Basic Skills Review for Math 216
Rounding
Round off as indicated
To the nearest ten:
1. 864 2. 71 3. 92 4. 913
5. 397 6. 542 7. 879 8. 356
To the nearest hundred:
9. 3164 10. 6475 11. 895 12. 372
13. 559 14. 5789 15. 75,623 16. 8009
To the nearest thousand:
17. 7915 18. 6507 19. 8500 20. 8499
21. 22,499 22. 22,501 23. 52,265 24. 37,800
Add, Subtract, Multiply, and
Divide with whole numbers
Add.
1. 89 + 72 + 45 2. 96 + 45 + 37 3. 146 + 359 + 47
4. 4752 + 6371 + 9175 + 854 5. 483 + 1685 + 2094 + 5008
Subtract.
1. 8742 – 3289 2. 6421 – 1783 3. 10,531 – 5467
4. Subtract 9378 from 12,045.
Multiply.
1. 235 x 76 2. 207 x 146 3. 673 x 85
4. Find the product of 420 and 63.
Divide.
1. 161 ÷ 15 2. 321 ÷ 7 3. 4406 ÷ 11
4. Find the quotient when 50,612 is divided by 471.
Order of Operations
Evaluate.
1. 4 ÷ 2 + 7 - 3 · 2 2. 8 · 3 ÷ 12 + 13
3. 6 + 3 · 2 - 10 ÷ 2 4. 14 · 3 ÷ 7 ÷ 2 + 6
Fractions
Find the LCD.
1. Find the LCD of 1/3, 5/12, and 1/15 2. Find the LCD of 5/8, 4/27, and 1/48
Add.
1. Add and simplify if possible: 11 ¾ + 2 5/16
Write the answer as a mixed number if appropriate.
2. Add and simplify if possible: 9 1/8 + 3 7/12
Write the answer as a mixed number if appropriate.
3. 7 3/5 + 2 1/8 4. 6 4/9 + 12 1/15
Subtract.
1. Subtract and simplify if possible: 6 5/6 - 3 1/4
Write the answer as a mixed number if appropriate.
2. Subtract and simplify if possible: 5 7/8 - 3 1/3
Write the answer as a mixed number if appropriate.
3. 4 ¾ - 2 1/8 4. 12 7/16 - 5 2/5
Multiply.
1. Multiply and simplify if possible: 5 ¼ x 2 2/3
Write the answer as a mixed number if appropriate.
2. Multiply and simplify if possible: 4 3/8 x 2 2/7
Write the answer as a mixed number if appropriate.
3. 8 ½ x 3 2/3 4. 9 1/3 x 2 1/7
Divide.
1. Divide and simplify if possible: 5 1/6 ÷ 3 1/4
Write the answer as a mixed number if appropriate.
2. Divide and simplify if possible: 4 1/5 ÷ 3 1/3
Write the answer as a mixed number if appropriate.
3. 4 5/8 ÷ 4 4. 7/8 ÷ 7 ½
Comparisons.
1. Determine which number is larger. 4 2/3 or 19/4
2. Determine which number is smaller. 5 2/5 or 43/8
3. Determine which number is larger. 3 13/16 or 96/25
4. Determine which number is larger. 2 13/20 or 21/8
5. Arrange the numbers in increasing order. 3.124, 3.003, 3.789, 3.016, 3.247
6. Arrange the numbers in decreasing order. 6.783, 6.925, 6.012, 6.785, 6.102
Decimals
Add.
1. 3.488 + 16.593 + 25.002
2. 52.3 + 6 + 21.01 + 4.005
3. 43.766 + 9.33 + 17 + 2.106
4. 2.051 + 0.2006 + 5.4 + 37
Subtract.
1. 40.718 - 6.532
2. 4 - 1.0566
3. 31.009 - 0.534
4. 4.8 – 0.0026
Multiply.
1. 95.62 x 0.57
2. 5.3 x 31.6
3. 6.02 x 0.57
4. 34.9 x 1.3
Divide.
1. 816.4 ÷ 0.65
2. 335.34 ÷ 0.23
3. 48 ÷ 2.4
4. 16.02 ÷ 0.03
Percents
Change decimals to percents.
1. Change 0.02 to a percent
2. Change 0.035 to a percent
3. Change 1.75 to a percent
4. Change 0.004 to a percent
Change percents to decimals
1. Change 35% to a decimal
2. Change 232% to a decimal
3. Change 0.52% to a decimal
4. Change 18.2% to a decimal
Change fractions to percents
1. Change 2/5 to a %
2. Change 5/8 to a %
3. Change 1 1/6 to a %
4. Change 2 1/15 to a %
Change percents to fractions
1. Change 0.3% to a fraction
2. Change 150% to a fraction
3. Change 12.5% to a fraction
4. Change 0.25% to a fraction
Solving percent problems
1. Find 18% of 345. 2. Find 13.5% of 95.
3. Find 150% of 70. 4. Find 8.4% of 52.
5. What percent of 96 is 16? 6. What percent of 32 is 24?
7. What percent of 48 is 16? 8. What percent of 60 is 90?
9. What percent is 17 of 34? 10. What percent is 43.92 of 244?
11. What percent is 60 of 150? 12. What percent is 4 of 12?
13. 20% of what is 17? 14. 3% of what is 21?
15. 150% of what is 63? 16. 2% of what is 3?
17. What is 80% of 50? 18. What is 75% of 12?
19. What is 15.2% of 75? 20. What is 110% of 25?
Answer Key for Basic Skills Review for
Math 216
Rounding
1. 860 2. 70 3. 90 4. 910
5. 400 6. 540 7. 880 8. 360
9. 3200 10. 6500 11. 900 12. 400
13. 600 14. 5800 15. 75,600 16. 8000
17. 8000 18. 7000 19. 9000 20. 8000
21. 22,000 22. 23,000 23. 52,000 24. 38,000
Add, Subtract, Multiply, and
Divide with whole numbers
Add
1. 206 2. 178 3. 552 4. 21,152 5. 9270
Subtract
1. 5453 2. 4638 3. 5064 4. 2667
Multiply
1. 17,860 2. 30,222 3. 57,205 4. 26,460
Divide
1. 10r11 2. 45r6 3. 400r6 4. 107r215
Order of Operations
1. 3 2. 15 3. 7 4. 9
Fractions
Find the LCD
1. 60 2. 432
Add
1. 14 1/16 2. 12 17/24 3. 9 29/40 4. 18 23/45
Subtract
1. 3 7/12 2. 2 13/24 3. 2 5/8 4. 7 3/80
Multiply
1. 14 2. 10 3. 31 1/6 4. 20
Divide
1. 1 23/39 2. 1 13/50 3. 1 5/32 4. 7/60
Comparisons
1. 19/4 2. 43/8 3. 96/25 4. 2 13/20
5. 3.003<3.016<3.124<3.247<3.789 6. 6.925>6.785>6.783>6.102>6.012
Decimals
Add
1. 45.083 2. 83.315 3. 72.202 4. 44.6516
Subtract
1. 34.186 2. 2.9434 3. 30.475 4. 4.7974
Multiply
1. 54.5034 2. 167.48 3. 3.4314 4. 45.37
Divide
1. 1256 2. 1458 3. 20 4. 534
Percents
Change decimals to percents
1. 2% 2. 3.5% 3. 175% 4. 0.4%
Change percents to decimals
1. 0.35 2. 2.32 3. 0.0052 4. 0.182
Change fractions to percents
1. 40% 2. 62.5% 3. 116 2/3% 4. 206 2/3%
Change percents to fractions
1. 3/1000 2. 3/2 or 1 ½ 3. 1/8 4. 1/400
Solving percent problems
1. 62.1 2. 12.825 3. 105 4. 4.368
5. 16 2/3% 6. 75% 7. 33 1/3% 8. 150%
9. 50% 10. 18% 11. 40% 12. 33 1/3%
13. 85 14. 700 15. 42 16. 150
17. 40 18. 9 19. 11.4 20. 27.5