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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 710 · 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 × 19 =
  2. 2.5 × 29 =
  3. 3.5 × 49 =
  4. 4.12 × 19 =
  5. 5.8 × 19 =
  6. 6.14 × 19 =
  7. 7.3 × 19 =
  8. 8.9 × 99 =
  9. 9.15 × 29 =
  10. 10.3 × 49 =
  11. 11.7 × 19 =
  12. 12.6 × 9 =
  13. 13.3 × 29 =
  14. 14.13 × 49 =
  15. 15.10 × 49 =
  16. 16.15 × 9 =
  17. 17.3 × 9 =
  18. 18.5 × 9 =
  19. 19.31 × 99 =
  20. 20.5 × 49 =
  21. 21.6 × 19 =
  22. 22.5 × 19 =
  23. 23.9 × 49 =
  24. 24.8 × 19 =
  25. 25.13 × 19 =
  26. 26.3 × 9 =
  27. 27.4 × 49 =
  28. 28.34 × 99 =
  29. 29.6 × 19 =
  30. 30.10 × 49 =
  31. 31.10 × 49 =
  32. 32.7 × 19 =
  33. 33.3 × 49 =
  34. 34.11 × 19 =
  35. 35.19 × 99 =
  36. 36.31 × 99 =
  37. 37.6 × 19 =
  38. 38.11 × 29 =
  39. 39.25 × 98 =
  40. 40.33 × 99 =

Answer key

  1. 152
  2. 145
  3. 245
  4. 228
  5. 152
  6. 266
  7. 57
  8. 891
  9. 435
  10. 147
  11. 133
  12. 54
  13. 87
  14. 637
  15. 490
  16. 135
  17. 27
  18. 45
  19. 3069
  20. 245
  21. 114
  22. 95
  23. 441
  24. 152
  25. 247
  26. 27
  27. 196
  28. 3366
  29. 114
  30. 490
  31. 490
  32. 133
  33. 147
  34. 209
  35. 1881
  36. 3069
  37. 114
  38. 319
  39. 2450
  40. 3267

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