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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 844 · 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. 1.13 × 9 =
  2. 2.12 × 19 =
  3. 3.5 × 99 =
  4. 4.6 × 29 =
  5. 5.14 × 99 =
  6. 6.4 × 49 =
  7. 7.8 × 99 =
  8. 8.3 × 19 =
  9. 9.19 × 99 =
  10. 10.11 × 98 =
  11. 11.11 × 19 =
  12. 12.15 × 49 =
  13. 13.10 × 19 =
  14. 14.33 × 98 =
  15. 15.9 × 99 =
  16. 16.10 × 9 =
  17. 17.8 × 19 =
  18. 18.14 × 49 =
  19. 19.7 × 19 =
  20. 20.5 × 29 =
  21. 21.35 × 99 =
  22. 22.11 × 29 =
  23. 23.11 × 29 =
  24. 24.12 × 19 =
  25. 25.5 × 9 =
  26. 26.3 × 98 =
  27. 27.8 × 99 =
  28. 28.37 × 98 =
  29. 29.23 × 99 =
  30. 30.37 × 99 =
  31. 31.7 × 9 =
  32. 32.33 × 98 =
  33. 33.10 × 29 =
  34. 34.14 × 49 =
  35. 35.3 × 19 =
  36. 36.40 × 98 =
  37. 37.3 × 29 =
  38. 38.8 × 9 =
  39. 39.29 × 99 =
  40. 40.5 × 9 =

Answer key

  1. 117
  2. 228
  3. 495
  4. 174
  5. 1386
  6. 196
  7. 792
  8. 57
  9. 1881
  10. 1078
  11. 209
  12. 735
  13. 190
  14. 3234
  15. 891
  16. 90
  17. 152
  18. 686
  19. 133
  20. 145
  21. 3465
  22. 319
  23. 319
  24. 228
  25. 45
  26. 294
  27. 792
  28. 3626
  29. 2277
  30. 3663
  31. 63
  32. 3234
  33. 290
  34. 686
  35. 57
  36. 3920
  37. 87
  38. 72
  39. 2871
  40. 45

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