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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 677 · 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 × 9 =
  2. 2.5 × 29 =
  3. 3.10 × 9 =
  4. 4.12 × 99 =
  5. 5.11 × 19 =
  6. 6.4 × 29 =
  7. 7.10 × 49 =
  8. 8.5 × 9 =
  9. 9.15 × 29 =
  10. 10.6 × 19 =
  11. 11.4 × 9 =
  12. 12.37 × 99 =
  13. 13.4 × 98 =
  14. 14.34 × 98 =
  15. 15.4 × 98 =
  16. 16.12 × 49 =
  17. 17.11 × 9 =
  18. 18.6 × 19 =
  19. 19.9 × 19 =
  20. 20.12 × 49 =
  21. 21.37 × 99 =
  22. 22.10 × 19 =
  23. 23.15 × 9 =
  24. 24.9 × 9 =
  25. 25.3 × 19 =
  26. 26.8 × 49 =
  27. 27.33 × 99 =
  28. 28.20 × 98 =
  29. 29.4 × 9 =
  30. 30.32 × 98 =
  31. 31.8 × 19 =
  32. 32.9 × 19 =
  33. 33.11 × 19 =
  34. 34.11 × 9 =
  35. 35.7 × 9 =
  36. 36.11 × 98 =
  37. 37.19 × 99 =
  38. 38.16 × 99 =
  39. 39.5 × 19 =
  40. 40.3 × 19 =

Answer key

  1. 135
  2. 145
  3. 90
  4. 1188
  5. 209
  6. 116
  7. 490
  8. 45
  9. 435
  10. 114
  11. 36
  12. 3663
  13. 392
  14. 3332
  15. 392
  16. 588
  17. 99
  18. 114
  19. 171
  20. 588
  21. 3663
  22. 190
  23. 135
  24. 81
  25. 57
  26. 392
  27. 3267
  28. 1960
  29. 36
  30. 3136
  31. 152
  32. 171
  33. 209
  34. 99
  35. 63
  36. 1078
  37. 1881
  38. 1584
  39. 95
  40. 57

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