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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 642 · 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. 2.11 × 19 =
  3. 3.5 × 19 =
  4. 4.10 × 19 =
  5. 5.7 × 19 =
  6. 6.8 × 9 =
  7. 7.11 × 98 =
  8. 8.13 × 29 =
  9. 9.4 × 9 =
  10. 10.12 × 29 =
  11. 11.36 × 99 =
  12. 12.8 × 98 =
  13. 13.3 × 29 =
  14. 14.8 × 49 =
  15. 15.38 × 98 =
  16. 16.25 × 99 =
  17. 17.7 × 19 =
  18. 18.15 × 29 =
  19. 19.15 × 29 =
  20. 20.7 × 9 =
  21. 21.14 × 19 =
  22. 22.8 × 49 =
  23. 23.34 × 99 =
  24. 24.32 × 99 =
  25. 25.12 × 19 =
  26. 26.8 × 49 =
  27. 27.5 × 29 =
  28. 28.13 × 29 =
  29. 29.22 × 99 =
  30. 30.12 × 19 =
  31. 31.7 × 29 =
  32. 32.15 × 9 =
  33. 33.13 × 9 =
  34. 34.19 × 99 =
  35. 35.40 × 98 =
  36. 36.4 × 29 =
  37. 37.5 × 98 =
  38. 38.20 × 99 =
  39. 39.11 × 19 =
  40. 40.11 × 19 =

Answer key

  1. 228
  2. 209
  3. 95
  4. 190
  5. 133
  6. 72
  7. 1078
  8. 377
  9. 36
  10. 348
  11. 3564
  12. 784
  13. 87
  14. 392
  15. 3724
  16. 2475
  17. 133
  18. 435
  19. 435
  20. 63
  21. 266
  22. 392
  23. 3366
  24. 3168
  25. 228
  26. 392
  27. 145
  28. 377
  29. 2178
  30. 228
  31. 203
  32. 135
  33. 117
  34. 1881
  35. 3920
  36. 116
  37. 490
  38. 1980
  39. 209
  40. 209

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