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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 66 · 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. 1.3 × 19 =
  2. 2.8 × 99 =
  3. 3.15 × 98 =
  4. 4.6 × 98 =
  5. 5.11 × 19 =
  6. 6.13 × 49 =
  7. 7.12 × 29 =
  8. 8.26 × 99 =
  9. 9.40 × 98 =
  10. 10.5 × 49 =
  11. 11.5 × 19 =
  12. 12.8 × 19 =
  13. 13.24 × 99 =
  14. 14.4 × 99 =
  15. 15.6 × 29 =
  16. 16.11 × 9 =
  17. 17.7 × 98 =
  18. 18.7 × 29 =
  19. 19.17 × 99 =
  20. 20.12 × 19 =
  21. 21.10 × 98 =
  22. 22.14 × 98 =
  23. 23.12 × 49 =
  24. 24.39 × 98 =
  25. 25.8 × 98 =
  26. 26.5 × 9 =
  27. 27.12 × 9 =
  28. 28.10 × 29 =
  29. 29.11 × 49 =
  30. 30.5 × 49 =
  31. 31.6 × 19 =
  32. 32.7 × 9 =
  33. 33.6 × 99 =
  34. 34.6 × 49 =
  35. 35.12 × 19 =
  36. 36.4 × 99 =
  37. 37.6 × 49 =
  38. 38.15 × 9 =
  39. 39.14 × 19 =
  40. 40.20 × 99 =

Answer key

  1. 57
  2. 792
  3. 1470
  4. 588
  5. 209
  6. 637
  7. 348
  8. 2574
  9. 3920
  10. 245
  11. 95
  12. 152
  13. 2376
  14. 396
  15. 174
  16. 99
  17. 686
  18. 203
  19. 1683
  20. 228
  21. 980
  22. 1372
  23. 588
  24. 3822
  25. 784
  26. 45
  27. 108
  28. 290
  29. 539
  30. 245
  31. 114
  32. 63
  33. 594
  34. 294
  35. 228
  36. 396
  37. 294
  38. 135
  39. 266
  40. 1980

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