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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 620 · 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. 1.22 × 98 =
  2. 2.19 × 98 =
  3. 3.33 × 98 =
  4. 4.36 × 98 =
  5. 5.8 × 99 =
  6. 6.3 × 19 =
  7. 7.13 × 29 =
  8. 8.6 × 9 =
  9. 9.4 × 9 =
  10. 10.7 × 19 =
  11. 11.6 × 19 =
  12. 12.3 × 49 =
  13. 13.5 × 29 =
  14. 14.5 × 49 =
  15. 15.39 × 99 =
  16. 16.9 × 9 =
  17. 17.6 × 29 =
  18. 18.8 × 49 =
  19. 19.3 × 99 =
  20. 20.12 × 99 =
  21. 21.12 × 19 =
  22. 22.3 × 29 =
  23. 23.5 × 19 =
  24. 24.20 × 98 =
  25. 25.15 × 9 =
  26. 26.3 × 9 =
  27. 27.13 × 9 =
  28. 28.9 × 49 =
  29. 29.3 × 29 =
  30. 30.6 × 29 =
  31. 31.8 × 9 =
  32. 32.12 × 9 =
  33. 33.3 × 9 =
  34. 34.9 × 9 =
  35. 35.4 × 49 =
  36. 36.38 × 98 =
  37. 37.4 × 9 =
  38. 38.7 × 9 =
  39. 39.22 × 99 =
  40. 40.3 × 29 =

Answer key

  1. 2156
  2. 1862
  3. 3234
  4. 3528
  5. 792
  6. 57
  7. 377
  8. 54
  9. 36
  10. 133
  11. 114
  12. 147
  13. 145
  14. 245
  15. 3861
  16. 81
  17. 174
  18. 392
  19. 297
  20. 1188
  21. 228
  22. 87
  23. 95
  24. 1960
  25. 135
  26. 27
  27. 117
  28. 441
  29. 87
  30. 174
  31. 72
  32. 108
  33. 27
  34. 81
  35. 196
  36. 3724
  37. 36
  38. 63
  39. 2178
  40. 87

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