Answer Key
This appendix includes the answers to the practice problems in Appendix A. Check your work and see how you’ve progressed!
Chapter 1: Multiplication
Chapter 2: Addition
1. | 150 |
2. | 157 |
3. | 170 |
4. | 148 |
5. | 136 |
6. | 1,164 |
7. | 909 |
8. | 1,059 |
9. | 1,206 |
10. | 1,369 |
11. | 20,790 |
12. | 19,510 |
13. | 21,631 |
14. | 19,725 |
15. | 12,135 |
16. | 63 |
17. | 70 |
18. | 76 |
19. | 74 |
20. | 84 |
21. | 8,561 |
22. | 14,004 |
23. | 11,821 |
24. | 9,193 |
25. | 14,196 |
1. | 283 |
2. | 35 |
3. | 180 |
4. | 439 |
5. | 285 |
6. | 37 |
7. | 14 |
8. | 41 |
9. | 14 |
10. | 42 |
11. | 4,134 |
12. | 6,702 |
13. | 2,775 |
14. | 2,076 |
15. | 1,458 |
16. | 8,983 |
17. | 4,313 |
18. | 66,853 |
19. | 53,378 |
20. | 70,943 |
Chapter 4: Division
1. | 53.813 |
2. | 202.68 |
3. | 215.464 |
4. | 49.989 |
5. | 77.493 |
6. | 101.845 |
7. | 225.986 |
8. | 474.411 |
9. | 60.327 |
10. | 81.980 |
11. | 91.873 |
12. | 93.364 |
13. | 261.004 |
14. | 121.459 |
15. | 181.894 |
16. | 0.0526 |
17. | 0.0588 |
18. | 0.4137 |
19. | 0.020408 |
20. | 0.01694 |
Chapter 5: Checking Your Answers with Digit Sums
1. | True |
2. | False |
3. | True |
4. | False |
5. | True |
6. | False |
7. | True |
8. | False |
9. | True |
10. | False |
11. | True |
12. | False |
13. | True |
14. | False |
15. | True |
16. | True |
17. | True |
18. | False |
19. | True |
20. | True |
1. | |
2. | |
3. | |
4. | |
5. | |
6. | |
7. | |
8. | |
9. | |
10. | |
11. | |
12. | |
13. | |
14. | |
15. | |
16. | |
17. | |
18. | |
19. | 4 |
20. |
Chapter 7: Decimals
1. | 14.51 |
2. | 10.68 |
3. | 3.03 |
4. | 8.68 |
5. | 9.76 |
6. | 5.65 |
7. | 11.79 |
8. | 6.20 |
9. | 21.26 |
10. | 59.90 |
11. | 68.00 |
12. | 29.70 |
13. | 4.16 |
14. | 8.32 |
15. | 46.53 |
16. | 21.035 |
17. | 3.312 |
18. | 7.494 |
19. | 5.792 |
20. | 16.117 |
1. | |
2. | |
3. | |
4. | |
5. | |
6. | 50% |
7. | 40% |
8. | 52% |
9. | 65% |
10. | 27% |
11. | 0.245 |
12. | 0.124 |
13. | 0.35 |
14. | 0.96 |
15. | 0.2688 |
16. | 150 |
17. | 48.3 |
18. | 328.5 |
19. | 137.4 |
20. | 56.7 |
21. | 50% |
22. | 16.67% |
23. | 22.13% |
24. | 47% |
25. | 7.79% |
26. | 23.07% |
27. | 6.25% |
28. | 12.28% |
29. | 13.6% |
30. | 4.36% |
Chapter 9: Divisibility
1. | 5,625 |
2. | 625 |
3. | 3,025 |
4. | 2,025 |
5. | 4,225 |
6. | 2,704 |
7. | 3,025 |
8. | 2,809 |
9. | 2,116 |
10. | 2,025 |
11. | 6,724 |
12. | 676 |
13. | 144 |
14. | 7,056 |
15. | 6,084 |
16. | 423,801 |
17. | 877,969 |
18. | 980,100 |
19. | 131,769 |
20. | 133,956 |
21. | 1,522,756 |
22. | 30,052,324 |
23. | 49,154,121 |
24. | 39,955,041 |
25. | 1,170,724 |
26. | 12,560 |
27. | 6,890 |
28. | 9,122 |
29. | 12,233 |
30. | 14,210 |
Chapter 11: Cubed Numbers
1. | 157,464 |
2. | 29,791 |
3. | 328,509 |
4. | 27,000 |
5. | 91,125 |
6. | 1,367,631 |
7. | 1,000,000 |
8. | 1,295,029 |
9. | 1,481,544 |
10. | 1,061,208 |
Chapter 12: Numbers to the Fourth and Fifth Powers
1. | 38,950,081 |
2. | 1,336,336 |
3. | 24,010,000 |
4. | 84,934,656 |
5. | 279,841 |
6. | 17,210,368 |
7. | 371,293 |
8. | 130,691,232 |
9. | 60,466,176 |
10. | 1,889,568 |
Chapter 13: Square and Cube Roots
1. | 28 |
2. | 16 |
3. | 14 |
4. | 29 |
5. | 27 |
6. | 261 |
7. | 582 |
8. | 306 |
9. | 252 |
10. | 212 |
11. | 27 |
12. | 36 |
13. | 95 |
14. | 99 |
15. | 46 |
18.118.198.83