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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 179 · 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. 1.6 × 9 =
  2. 2.13 × 19 =
  3. 3.6 × 9 =
  4. 4.8 × 98 =
  5. 5.3 × 19 =
  6. 6.15 × 29 =
  7. 7.6 × 49 =
  8. 8.3 × 9 =
  9. 9.37 × 99 =
  10. 10.4 × 29 =
  11. 11.30 × 99 =
  12. 12.3 × 19 =
  13. 13.37 × 98 =
  14. 14.6 × 9 =
  15. 15.15 × 99 =
  16. 16.17 × 98 =
  17. 17.5 × 19 =
  18. 18.11 × 19 =
  19. 19.40 × 99 =
  20. 20.4 × 9 =
  21. 21.11 × 19 =
  22. 22.14 × 9 =
  23. 23.20 × 98 =
  24. 24.24 × 99 =
  25. 25.9 × 49 =
  26. 26.8 × 49 =
  27. 27.12 × 98 =
  28. 28.4 × 29 =
  29. 29.14 × 9 =
  30. 30.15 × 29 =
  31. 31.5 × 49 =
  32. 32.3 × 9 =
  33. 33.22 × 99 =
  34. 34.6 × 9 =
  35. 35.7 × 98 =
  36. 36.13 × 49 =
  37. 37.9 × 29 =
  38. 38.10 × 29 =
  39. 39.37 × 99 =
  40. 40.12 × 9 =

Answer key

  1. 54
  2. 247
  3. 54
  4. 784
  5. 57
  6. 435
  7. 294
  8. 27
  9. 3663
  10. 116
  11. 2970
  12. 57
  13. 3626
  14. 54
  15. 1485
  16. 1666
  17. 95
  18. 209
  19. 3960
  20. 36
  21. 209
  22. 126
  23. 1960
  24. 2376
  25. 441
  26. 392
  27. 1176
  28. 116
  29. 126
  30. 435
  31. 245
  32. 27
  33. 2178
  34. 54
  35. 686
  36. 637
  37. 261
  38. 290
  39. 3663
  40. 108

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