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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 63 · 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. 1.32 × 99 =
  2. 2.10 × 19 =
  3. 3.8 × 9 =
  4. 4.9 × 98 =
  5. 5.24 × 99 =
  6. 6.4 × 19 =
  7. 7.9 × 98 =
  8. 8.11 × 98 =
  9. 9.4 × 19 =
  10. 10.9 × 29 =
  11. 11.12 × 49 =
  12. 12.3 × 9 =
  13. 13.8 × 9 =
  14. 14.4 × 19 =
  15. 15.3 × 49 =
  16. 16.14 × 19 =
  17. 17.7 × 29 =
  18. 18.4 × 49 =
  19. 19.28 × 98 =
  20. 20.13 × 9 =
  21. 21.15 × 49 =
  22. 22.12 × 49 =
  23. 23.10 × 9 =
  24. 24.10 × 98 =
  25. 25.5 × 29 =
  26. 26.34 × 98 =
  27. 27.3 × 98 =
  28. 28.31 × 99 =
  29. 29.3 × 99 =
  30. 30.6 × 98 =
  31. 31.4 × 29 =
  32. 32.11 × 9 =
  33. 33.15 × 99 =
  34. 34.7 × 19 =
  35. 35.13 × 19 =
  36. 36.4 × 99 =
  37. 37.16 × 98 =
  38. 38.12 × 9 =
  39. 39.32 × 99 =
  40. 40.3 × 29 =

Answer key

  1. 3168
  2. 190
  3. 72
  4. 882
  5. 2376
  6. 76
  7. 882
  8. 1078
  9. 76
  10. 261
  11. 588
  12. 27
  13. 72
  14. 76
  15. 147
  16. 266
  17. 203
  18. 196
  19. 2744
  20. 117
  21. 735
  22. 588
  23. 90
  24. 980
  25. 145
  26. 3332
  27. 294
  28. 3069
  29. 297
  30. 588
  31. 116
  32. 99
  33. 1485
  34. 133
  35. 247
  36. 396
  37. 1568
  38. 108
  39. 3168
  40. 87

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