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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 112 · 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. 1.8 × 49 =
  2. 2.7 × 9 =
  3. 3.8 × 9 =
  4. 4.11 × 19 =
  5. 5.12 × 49 =
  6. 6.9 × 9 =
  7. 7.3 × 9 =
  8. 8.11 × 49 =
  9. 9.8 × 49 =
  10. 10.10 × 29 =
  11. 11.13 × 49 =
  12. 12.3 × 19 =
  13. 13.12 × 19 =
  14. 14.16 × 99 =
  15. 15.5 × 99 =
  16. 16.11 × 99 =
  17. 17.36 × 99 =
  18. 18.13 × 99 =
  19. 19.10 × 9 =
  20. 20.8 × 19 =
  21. 21.24 × 99 =
  22. 22.7 × 19 =
  23. 23.15 × 9 =
  24. 24.8 × 19 =
  25. 25.3 × 19 =
  26. 26.11 × 9 =
  27. 27.24 × 99 =
  28. 28.9 × 99 =
  29. 29.37 × 99 =
  30. 30.4 × 49 =
  31. 31.8 × 49 =
  32. 32.29 × 98 =
  33. 33.6 × 29 =
  34. 34.18 × 99 =
  35. 35.13 × 9 =
  36. 36.11 × 99 =
  37. 37.15 × 98 =
  38. 38.29 × 98 =
  39. 39.3 × 49 =
  40. 40.11 × 99 =

Answer key

  1. 392
  2. 63
  3. 72
  4. 209
  5. 588
  6. 81
  7. 27
  8. 539
  9. 392
  10. 290
  11. 637
  12. 57
  13. 228
  14. 1584
  15. 495
  16. 1089
  17. 3564
  18. 1287
  19. 90
  20. 152
  21. 2376
  22. 133
  23. 135
  24. 152
  25. 57
  26. 99
  27. 2376
  28. 891
  29. 3663
  30. 196
  31. 392
  32. 2842
  33. 174
  34. 1782
  35. 117
  36. 1089
  37. 1470
  38. 2842
  39. 147
  40. 1089

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