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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 472 · 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. 1.33 × 99 =
  2. 2.3 × 29 =
  3. 3.6 × 19 =
  4. 4.5 × 9 =
  5. 5.14 × 29 =
  6. 6.14 × 29 =
  7. 7.4 × 9 =
  8. 8.5 × 19 =
  9. 9.3 × 19 =
  10. 10.5 × 29 =
  11. 11.17 × 99 =
  12. 12.40 × 99 =
  13. 13.10 × 29 =
  14. 14.6 × 29 =
  15. 15.34 × 98 =
  16. 16.14 × 99 =
  17. 17.17 × 98 =
  18. 18.27 × 99 =
  19. 19.7 × 49 =
  20. 20.6 × 19 =
  21. 21.5 × 49 =
  22. 22.13 × 29 =
  23. 23.15 × 99 =
  24. 24.32 × 99 =
  25. 25.6 × 19 =
  26. 26.3 × 19 =
  27. 27.8 × 9 =
  28. 28.8 × 98 =
  29. 29.8 × 29 =
  30. 30.8 × 19 =
  31. 31.13 × 98 =
  32. 32.12 × 29 =
  33. 33.9 × 49 =
  34. 34.6 × 99 =
  35. 35.13 × 29 =
  36. 36.9 × 29 =
  37. 37.14 × 49 =
  38. 38.13 × 49 =
  39. 39.11 × 99 =
  40. 40.4 × 29 =

Answer key

  1. 3267
  2. 87
  3. 114
  4. 45
  5. 406
  6. 406
  7. 36
  8. 95
  9. 57
  10. 145
  11. 1683
  12. 3960
  13. 290
  14. 174
  15. 3332
  16. 1386
  17. 1666
  18. 2673
  19. 343
  20. 114
  21. 245
  22. 377
  23. 1485
  24. 3168
  25. 114
  26. 57
  27. 72
  28. 784
  29. 232
  30. 152
  31. 1274
  32. 348
  33. 441
  34. 594
  35. 377
  36. 261
  37. 686
  38. 637
  39. 1089
  40. 116

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