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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 671 · 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. 1.15 × 19 =
  2. 2.4 × 9 =
  3. 3.8 × 99 =
  4. 4.9 × 9 =
  5. 5.3 × 19 =
  6. 6.5 × 29 =
  7. 7.8 × 49 =
  8. 8.32 × 99 =
  9. 9.29 × 98 =
  10. 10.8 × 29 =
  11. 11.15 × 29 =
  12. 12.13 × 19 =
  13. 13.5 × 9 =
  14. 14.7 × 9 =
  15. 15.4 × 99 =
  16. 16.11 × 9 =
  17. 17.14 × 98 =
  18. 18.25 × 98 =
  19. 19.11 × 19 =
  20. 20.4 × 29 =
  21. 21.13 × 29 =
  22. 22.14 × 49 =
  23. 23.28 × 98 =
  24. 24.6 × 19 =
  25. 25.18 × 98 =
  26. 26.10 × 29 =
  27. 27.15 × 19 =
  28. 28.4 × 99 =
  29. 29.10 × 9 =
  30. 30.7 × 19 =
  31. 31.8 × 49 =
  32. 32.3 × 19 =
  33. 33.14 × 98 =
  34. 34.11 × 29 =
  35. 35.12 × 9 =
  36. 36.10 × 19 =
  37. 37.3 × 99 =
  38. 38.8 × 9 =
  39. 39.7 × 9 =
  40. 40.3 × 19 =

Answer key

  1. 285
  2. 36
  3. 792
  4. 81
  5. 57
  6. 145
  7. 392
  8. 3168
  9. 2842
  10. 232
  11. 435
  12. 247
  13. 45
  14. 63
  15. 396
  16. 99
  17. 1372
  18. 2450
  19. 209
  20. 116
  21. 377
  22. 686
  23. 2744
  24. 114
  25. 1764
  26. 290
  27. 285
  28. 396
  29. 90
  30. 133
  31. 392
  32. 57
  33. 1372
  34. 319
  35. 108
  36. 190
  37. 297
  38. 72
  39. 63
  40. 57

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