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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 96 · 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 × 99 =
  2. 2.36 × 98 =
  3. 3.15 × 29 =
  4. 4.13 × 99 =
  5. 5.4 × 99 =
  6. 6.3 × 19 =
  7. 7.34 × 98 =
  8. 8.6 × 49 =
  9. 9.13 × 29 =
  10. 10.15 × 99 =
  11. 11.10 × 29 =
  12. 12.9 × 9 =
  13. 13.10 × 9 =
  14. 14.19 × 99 =
  15. 15.6 × 19 =
  16. 16.4 × 49 =
  17. 17.3 × 29 =
  18. 18.12 × 9 =
  19. 19.15 × 29 =
  20. 20.8 × 9 =
  21. 21.38 × 99 =
  22. 22.11 × 9 =
  23. 23.5 × 19 =
  24. 24.40 × 98 =
  25. 25.6 × 29 =
  26. 26.25 × 99 =
  27. 27.12 × 9 =
  28. 28.11 × 29 =
  29. 29.34 × 99 =
  30. 30.13 × 49 =
  31. 31.13 × 98 =
  32. 32.21 × 99 =
  33. 33.12 × 29 =
  34. 34.15 × 99 =
  35. 35.3 × 9 =
  36. 36.8 × 9 =
  37. 37.9 × 9 =
  38. 38.5 × 29 =
  39. 39.32 × 98 =
  40. 40.5 × 19 =

Answer key

  1. 1485
  2. 3528
  3. 435
  4. 1287
  5. 396
  6. 57
  7. 3332
  8. 294
  9. 377
  10. 1485
  11. 290
  12. 81
  13. 90
  14. 1881
  15. 114
  16. 196
  17. 87
  18. 108
  19. 435
  20. 72
  21. 3762
  22. 99
  23. 95
  24. 3920
  25. 174
  26. 2475
  27. 108
  28. 319
  29. 3366
  30. 637
  31. 1274
  32. 2079
  33. 348
  34. 1485
  35. 27
  36. 72
  37. 81
  38. 145
  39. 3136
  40. 95

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