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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 735 · 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 × 29 =
  2. 2.3 × 49 =
  3. 3.12 × 29 =
  4. 4.9 × 29 =
  5. 5.5 × 29 =
  6. 6.9 × 19 =
  7. 7.16 × 99 =
  8. 8.5 × 49 =
  9. 9.3 × 19 =
  10. 10.10 × 49 =
  11. 11.15 × 19 =
  12. 12.7 × 49 =
  13. 13.9 × 19 =
  14. 14.17 × 99 =
  15. 15.12 × 19 =
  16. 16.10 × 99 =
  17. 17.31 × 99 =
  18. 18.12 × 9 =
  19. 19.12 × 49 =
  20. 20.8 × 19 =
  21. 21.15 × 29 =
  22. 22.4 × 19 =
  23. 23.13 × 29 =
  24. 24.40 × 99 =
  25. 25.22 × 98 =
  26. 26.5 × 19 =
  27. 27.15 × 49 =
  28. 28.11 × 19 =
  29. 29.15 × 19 =
  30. 30.5 × 49 =
  31. 31.6 × 99 =
  32. 32.12 × 19 =
  33. 33.15 × 9 =
  34. 34.11 × 19 =
  35. 35.5 × 9 =
  36. 36.11 × 49 =
  37. 37.3 × 19 =
  38. 38.5 × 19 =
  39. 39.8 × 19 =
  40. 40.9 × 9 =

Answer key

  1. 435
  2. 147
  3. 348
  4. 261
  5. 145
  6. 171
  7. 1584
  8. 245
  9. 57
  10. 490
  11. 285
  12. 343
  13. 171
  14. 1683
  15. 228
  16. 990
  17. 3069
  18. 108
  19. 588
  20. 152
  21. 435
  22. 76
  23. 377
  24. 3960
  25. 2156
  26. 95
  27. 735
  28. 209
  29. 285
  30. 245
  31. 594
  32. 228
  33. 135
  34. 209
  35. 45
  36. 539
  37. 57
  38. 95
  39. 152
  40. 81

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