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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 198 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.7 × 9 =
  2. 2.5 × 99 =
  3. 3.12 × 99 =
  4. 4.17 × 98 =
  5. 5.15 × 99 =
  6. 6.29 × 98 =
  7. 7.6 × 49 =
  8. 8.5 × 9 =
  9. 9.13 × 9 =
  10. 10.27 × 99 =
  11. 11.8 × 49 =
  12. 12.12 × 19 =
  13. 13.6 × 29 =
  14. 14.14 × 19 =
  15. 15.8 × 19 =
  16. 16.9 × 29 =
  17. 17.7 × 49 =
  18. 18.14 × 49 =
  19. 19.6 × 19 =
  20. 20.7 × 29 =
  21. 21.9 × 19 =
  22. 22.7 × 98 =
  23. 23.22 × 99 =
  24. 24.30 × 98 =
  25. 25.18 × 98 =
  26. 26.7 × 49 =
  27. 27.15 × 9 =
  28. 28.9 × 99 =
  29. 29.15 × 9 =
  30. 30.6 × 9 =
  31. 31.12 × 19 =
  32. 32.6 × 19 =
  33. 33.32 × 99 =
  34. 34.4 × 19 =
  35. 35.11 × 49 =
  36. 36.21 × 98 =
  37. 37.11 × 9 =
  38. 38.28 × 98 =
  39. 39.3 × 98 =
  40. 40.14 × 29 =

Answer key

  1. 63
  2. 495
  3. 1188
  4. 1666
  5. 1485
  6. 2842
  7. 294
  8. 45
  9. 117
  10. 2673
  11. 392
  12. 228
  13. 174
  14. 266
  15. 152
  16. 261
  17. 343
  18. 686
  19. 114
  20. 203
  21. 171
  22. 686
  23. 2178
  24. 2940
  25. 1764
  26. 343
  27. 135
  28. 891
  29. 135
  30. 54
  31. 228
  32. 114
  33. 3168
  34. 76
  35. 539
  36. 2058
  37. 99
  38. 2744
  39. 294
  40. 406

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