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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 817 · 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. 1.20 × 98 =
  2. 2.12 × 9 =
  3. 3.7 × 29 =
  4. 4.13 × 49 =
  5. 5.7 × 49 =
  6. 6.11 × 98 =
  7. 7.10 × 29 =
  8. 8.3 × 9 =
  9. 9.8 × 99 =
  10. 10.36 × 98 =
  11. 11.8 × 98 =
  12. 12.6 × 19 =
  13. 13.15 × 29 =
  14. 14.5 × 9 =
  15. 15.15 × 9 =
  16. 16.15 × 9 =
  17. 17.8 × 9 =
  18. 18.15 × 49 =
  19. 19.12 × 29 =
  20. 20.26 × 98 =
  21. 21.4 × 98 =
  22. 22.3 × 49 =
  23. 23.13 × 29 =
  24. 24.39 × 98 =
  25. 25.14 × 19 =
  26. 26.31 × 98 =
  27. 27.31 × 99 =
  28. 28.5 × 98 =
  29. 29.31 × 99 =
  30. 30.12 × 9 =
  31. 31.16 × 99 =
  32. 32.13 × 19 =
  33. 33.24 × 98 =
  34. 34.10 × 99 =
  35. 35.4 × 49 =
  36. 36.16 × 98 =
  37. 37.5 × 9 =
  38. 38.11 × 19 =
  39. 39.14 × 29 =
  40. 40.37 × 99 =

Answer key

  1. 1960
  2. 108
  3. 203
  4. 637
  5. 343
  6. 1078
  7. 290
  8. 27
  9. 792
  10. 3528
  11. 784
  12. 114
  13. 435
  14. 45
  15. 135
  16. 135
  17. 72
  18. 735
  19. 348
  20. 2548
  21. 392
  22. 147
  23. 377
  24. 3822
  25. 266
  26. 3038
  27. 3069
  28. 490
  29. 3069
  30. 108
  31. 1584
  32. 247
  33. 2352
  34. 990
  35. 196
  36. 1568
  37. 45
  38. 209
  39. 406
  40. 3663

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