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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 615 · 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. 1.6 × 19 =
  2. 2.37 × 98 =
  3. 3.12 × 99 =
  4. 4.6 × 99 =
  5. 5.11 × 98 =
  6. 6.8 × 98 =
  7. 7.8 × 49 =
  8. 8.11 × 19 =
  9. 9.11 × 9 =
  10. 10.11 × 29 =
  11. 11.7 × 9 =
  12. 12.3 × 49 =
  13. 13.21 × 99 =
  14. 14.11 × 19 =
  15. 15.7 × 19 =
  16. 16.3 × 49 =
  17. 17.23 × 99 =
  18. 18.6 × 9 =
  19. 19.8 × 19 =
  20. 20.9 × 49 =
  21. 21.5 × 9 =
  22. 22.39 × 99 =
  23. 23.14 × 19 =
  24. 24.11 × 29 =
  25. 25.6 × 99 =
  26. 26.18 × 98 =
  27. 27.15 × 29 =
  28. 28.33 × 98 =
  29. 29.25 × 98 =
  30. 30.25 × 98 =
  31. 31.5 × 49 =
  32. 32.26 × 98 =
  33. 33.6 × 99 =
  34. 34.3 × 9 =
  35. 35.5 × 19 =
  36. 36.20 × 99 =
  37. 37.6 × 9 =
  38. 38.15 × 49 =
  39. 39.37 × 99 =
  40. 40.12 × 19 =

Answer key

  1. 114
  2. 3626
  3. 1188
  4. 594
  5. 1078
  6. 784
  7. 392
  8. 209
  9. 99
  10. 319
  11. 63
  12. 147
  13. 2079
  14. 209
  15. 133
  16. 147
  17. 2277
  18. 54
  19. 152
  20. 441
  21. 45
  22. 3861
  23. 266
  24. 319
  25. 594
  26. 1764
  27. 435
  28. 3234
  29. 2450
  30. 2450
  31. 245
  32. 2548
  33. 594
  34. 27
  35. 95
  36. 1980
  37. 54
  38. 735
  39. 3663
  40. 228

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