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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 822 · 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. 1.10 × 9 =
  2. 2.31 × 98 =
  3. 3.11 × 99 =
  4. 4.8 × 49 =
  5. 5.11 × 99 =
  6. 6.5 × 19 =
  7. 7.3 × 9 =
  8. 8.40 × 99 =
  9. 9.4 × 49 =
  10. 10.14 × 49 =
  11. 11.4 × 49 =
  12. 12.13 × 19 =
  13. 13.21 × 99 =
  14. 14.7 × 9 =
  15. 15.6 × 99 =
  16. 16.9 × 98 =
  17. 17.15 × 98 =
  18. 18.3 × 29 =
  19. 19.23 × 99 =
  20. 20.15 × 9 =
  21. 21.9 × 9 =
  22. 22.5 × 99 =
  23. 23.13 × 19 =
  24. 24.10 × 9 =
  25. 25.15 × 9 =
  26. 26.11 × 9 =
  27. 27.21 × 98 =
  28. 28.13 × 49 =
  29. 29.14 × 9 =
  30. 30.12 × 49 =
  31. 31.3 × 9 =
  32. 32.16 × 99 =
  33. 33.13 × 49 =
  34. 34.10 × 29 =
  35. 35.4 × 9 =
  36. 36.5 × 29 =
  37. 37.15 × 49 =
  38. 38.10 × 19 =
  39. 39.4 × 98 =
  40. 40.3 × 49 =

Answer key

  1. 90
  2. 3038
  3. 1089
  4. 392
  5. 1089
  6. 95
  7. 27
  8. 3960
  9. 196
  10. 686
  11. 196
  12. 247
  13. 2079
  14. 63
  15. 594
  16. 882
  17. 1470
  18. 87
  19. 2277
  20. 135
  21. 81
  22. 495
  23. 247
  24. 90
  25. 135
  26. 99
  27. 2058
  28. 637
  29. 126
  30. 588
  31. 27
  32. 1584
  33. 637
  34. 290
  35. 36
  36. 145
  37. 735
  38. 190
  39. 392
  40. 147

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