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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 441 · 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. 1.12 × 49 =
  2. 2.15 × 29 =
  3. 3.12 × 19 =
  4. 4.30 × 99 =
  5. 5.8 × 9 =
  6. 6.3 × 19 =
  7. 7.5 × 49 =
  8. 8.18 × 98 =
  9. 9.31 × 99 =
  10. 10.13 × 9 =
  11. 11.15 × 49 =
  12. 12.10 × 29 =
  13. 13.11 × 9 =
  14. 14.5 × 29 =
  15. 15.4 × 49 =
  16. 16.3 × 9 =
  17. 17.8 × 29 =
  18. 18.38 × 99 =
  19. 19.9 × 19 =
  20. 20.11 × 29 =
  21. 21.4 × 49 =
  22. 22.9 × 99 =
  23. 23.6 × 9 =
  24. 24.7 × 19 =
  25. 25.13 × 29 =
  26. 26.4 × 29 =
  27. 27.12 × 99 =
  28. 28.4 × 99 =
  29. 29.11 × 19 =
  30. 30.36 × 98 =
  31. 31.3 × 98 =
  32. 32.8 × 29 =
  33. 33.13 × 49 =
  34. 34.6 × 19 =
  35. 35.14 × 9 =
  36. 36.5 × 98 =
  37. 37.33 × 98 =
  38. 38.12 × 29 =
  39. 39.5 × 29 =
  40. 40.33 × 98 =

Answer key

  1. 588
  2. 435
  3. 228
  4. 2970
  5. 72
  6. 57
  7. 245
  8. 1764
  9. 3069
  10. 117
  11. 735
  12. 290
  13. 99
  14. 145
  15. 196
  16. 27
  17. 232
  18. 3762
  19. 171
  20. 319
  21. 196
  22. 891
  23. 54
  24. 133
  25. 377
  26. 116
  27. 1188
  28. 396
  29. 209
  30. 3528
  31. 294
  32. 232
  33. 637
  34. 114
  35. 126
  36. 490
  37. 3234
  38. 348
  39. 145
  40. 3234

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