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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 676 · 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. 1.7 × 98 =
  2. 2.11 × 9 =
  3. 3.7 × 49 =
  4. 4.38 × 99 =
  5. 5.32 × 99 =
  6. 6.7 × 19 =
  7. 7.7 × 9 =
  8. 8.6 × 49 =
  9. 9.10 × 9 =
  10. 10.10 × 98 =
  11. 11.6 × 9 =
  12. 12.9 × 29 =
  13. 13.15 × 99 =
  14. 14.4 × 49 =
  15. 15.6 × 99 =
  16. 16.26 × 99 =
  17. 17.5 × 29 =
  18. 18.12 × 49 =
  19. 19.6 × 9 =
  20. 20.31 × 99 =
  21. 21.7 × 9 =
  22. 22.13 × 49 =
  23. 23.7 × 19 =
  24. 24.4 × 9 =
  25. 25.10 × 9 =
  26. 26.28 × 98 =
  27. 27.14 × 9 =
  28. 28.7 × 9 =
  29. 29.9 × 9 =
  30. 30.10 × 29 =
  31. 31.15 × 29 =
  32. 32.14 × 29 =
  33. 33.12 × 29 =
  34. 34.14 × 9 =
  35. 35.7 × 99 =
  36. 36.3 × 29 =
  37. 37.6 × 49 =
  38. 38.9 × 19 =
  39. 39.13 × 49 =
  40. 40.15 × 49 =

Answer key

  1. 686
  2. 99
  3. 343
  4. 3762
  5. 3168
  6. 133
  7. 63
  8. 294
  9. 90
  10. 980
  11. 54
  12. 261
  13. 1485
  14. 196
  15. 594
  16. 2574
  17. 145
  18. 588
  19. 54
  20. 3069
  21. 63
  22. 637
  23. 133
  24. 36
  25. 90
  26. 2744
  27. 126
  28. 63
  29. 81
  30. 290
  31. 435
  32. 406
  33. 348
  34. 126
  35. 693
  36. 87
  37. 294
  38. 171
  39. 637
  40. 735

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