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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 181 · 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. 1.13 × 9 =
  2. 2.11 × 49 =
  3. 3.9 × 29 =
  4. 4.5 × 49 =
  5. 5.9 × 19 =
  6. 6.10 × 29 =
  7. 7.9 × 9 =
  8. 8.10 × 29 =
  9. 9.12 × 99 =
  10. 10.13 × 9 =
  11. 11.38 × 99 =
  12. 12.35 × 99 =
  13. 13.10 × 49 =
  14. 14.8 × 49 =
  15. 15.8 × 9 =
  16. 16.3 × 19 =
  17. 17.5 × 19 =
  18. 18.11 × 99 =
  19. 19.8 × 19 =
  20. 20.19 × 98 =
  21. 21.12 × 29 =
  22. 22.31 × 98 =
  23. 23.13 × 29 =
  24. 24.11 × 29 =
  25. 25.13 × 9 =
  26. 26.4 × 19 =
  27. 27.4 × 49 =
  28. 28.10 × 9 =
  29. 29.8 × 9 =
  30. 30.3 × 29 =
  31. 31.6 × 19 =
  32. 32.7 × 19 =
  33. 33.14 × 49 =
  34. 34.28 × 98 =
  35. 35.13 × 19 =
  36. 36.9 × 49 =
  37. 37.3 × 29 =
  38. 38.5 × 29 =
  39. 39.4 × 29 =
  40. 40.15 × 9 =

Answer key

  1. 117
  2. 539
  3. 261
  4. 245
  5. 171
  6. 290
  7. 81
  8. 290
  9. 1188
  10. 117
  11. 3762
  12. 3465
  13. 490
  14. 392
  15. 72
  16. 57
  17. 95
  18. 1089
  19. 152
  20. 1862
  21. 348
  22. 3038
  23. 377
  24. 319
  25. 117
  26. 76
  27. 196
  28. 90
  29. 72
  30. 87
  31. 114
  32. 133
  33. 686
  34. 2744
  35. 247
  36. 441
  37. 87
  38. 145
  39. 116
  40. 135

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