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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 571 · 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 × 29 =
  2. 2.15 × 9 =
  3. 3.8 × 29 =
  4. 4.14 × 19 =
  5. 5.6 × 99 =
  6. 6.8 × 9 =
  7. 7.17 × 99 =
  8. 8.7 × 29 =
  9. 9.17 × 98 =
  10. 10.9 × 49 =
  11. 11.12 × 19 =
  12. 12.3 × 19 =
  13. 13.27 × 98 =
  14. 14.6 × 19 =
  15. 15.11 × 49 =
  16. 16.12 × 99 =
  17. 17.5 × 29 =
  18. 18.31 × 99 =
  19. 19.10 × 99 =
  20. 20.12 × 19 =
  21. 21.8 × 49 =
  22. 22.7 × 49 =
  23. 23.24 × 98 =
  24. 24.4 × 19 =
  25. 25.5 × 9 =
  26. 26.9 × 29 =
  27. 27.5 × 9 =
  28. 28.11 × 19 =
  29. 29.3 × 29 =
  30. 30.6 × 99 =
  31. 31.9 × 98 =
  32. 32.3 × 98 =
  33. 33.29 × 99 =
  34. 34.26 × 98 =
  35. 35.29 × 98 =
  36. 36.12 × 29 =
  37. 37.4 × 99 =
  38. 38.13 × 19 =
  39. 39.8 × 9 =
  40. 40.14 × 29 =

Answer key

  1. 203
  2. 135
  3. 232
  4. 266
  5. 594
  6. 72
  7. 1683
  8. 203
  9. 1666
  10. 441
  11. 228
  12. 57
  13. 2646
  14. 114
  15. 539
  16. 1188
  17. 145
  18. 3069
  19. 990
  20. 228
  21. 392
  22. 343
  23. 2352
  24. 76
  25. 45
  26. 261
  27. 45
  28. 209
  29. 87
  30. 594
  31. 882
  32. 294
  33. 2871
  34. 2548
  35. 2842
  36. 348
  37. 396
  38. 247
  39. 72
  40. 406

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