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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 107 · 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. 1.12 × 19 =
  2. 2.15 × 19 =
  3. 3.24 × 98 =
  4. 4.24 × 98 =
  5. 5.15 × 19 =
  6. 6.21 × 99 =
  7. 7.8 × 29 =
  8. 8.4 × 9 =
  9. 9.4 × 9 =
  10. 10.11 × 29 =
  11. 11.39 × 98 =
  12. 12.4 × 9 =
  13. 13.25 × 98 =
  14. 14.14 × 19 =
  15. 15.6 × 19 =
  16. 16.17 × 99 =
  17. 17.6 × 9 =
  18. 18.13 × 19 =
  19. 19.10 × 49 =
  20. 20.3 × 9 =
  21. 21.10 × 29 =
  22. 22.9 × 19 =
  23. 23.4 × 49 =
  24. 24.35 × 98 =
  25. 25.21 × 98 =
  26. 26.4 × 29 =
  27. 27.32 × 99 =
  28. 28.40 × 99 =
  29. 29.4 × 19 =
  30. 30.4 × 98 =
  31. 31.8 × 98 =
  32. 32.19 × 99 =
  33. 33.4 × 19 =
  34. 34.15 × 19 =
  35. 35.7 × 19 =
  36. 36.5 × 19 =
  37. 37.32 × 99 =
  38. 38.39 × 99 =
  39. 39.12 × 19 =
  40. 40.4 × 49 =

Answer key

  1. 228
  2. 285
  3. 2352
  4. 2352
  5. 285
  6. 2079
  7. 232
  8. 36
  9. 36
  10. 319
  11. 3822
  12. 36
  13. 2450
  14. 266
  15. 114
  16. 1683
  17. 54
  18. 247
  19. 490
  20. 27
  21. 290
  22. 171
  23. 196
  24. 3430
  25. 2058
  26. 116
  27. 3168
  28. 3960
  29. 76
  30. 392
  31. 784
  32. 1881
  33. 76
  34. 285
  35. 133
  36. 95
  37. 3168
  38. 3861
  39. 228
  40. 196

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