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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 148 · 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 × 49 =
  2. 2.13 × 29 =
  3. 3.10 × 19 =
  4. 4.12 × 9 =
  5. 5.13 × 99 =
  6. 6.15 × 9 =
  7. 7.9 × 49 =
  8. 8.12 × 49 =
  9. 9.13 × 29 =
  10. 10.3 × 19 =
  11. 11.37 × 99 =
  12. 12.9 × 19 =
  13. 13.6 × 9 =
  14. 14.14 × 29 =
  15. 15.11 × 98 =
  16. 16.12 × 19 =
  17. 17.5 × 29 =
  18. 18.7 × 99 =
  19. 19.13 × 99 =
  20. 20.4 × 9 =
  21. 21.6 × 9 =
  22. 22.11 × 98 =
  23. 23.10 × 19 =
  24. 24.3 × 98 =
  25. 25.8 × 9 =
  26. 26.14 × 19 =
  27. 27.10 × 9 =
  28. 28.7 × 49 =
  29. 29.11 × 49 =
  30. 30.13 × 29 =
  31. 31.10 × 19 =
  32. 32.4 × 9 =
  33. 33.10 × 49 =
  34. 34.15 × 29 =
  35. 35.3 × 9 =
  36. 36.14 × 19 =
  37. 37.3 × 99 =
  38. 38.11 × 49 =
  39. 39.15 × 9 =
  40. 40.15 × 29 =

Answer key

  1. 343
  2. 377
  3. 190
  4. 108
  5. 1287
  6. 135
  7. 441
  8. 588
  9. 377
  10. 57
  11. 3663
  12. 171
  13. 54
  14. 406
  15. 1078
  16. 228
  17. 145
  18. 693
  19. 1287
  20. 36
  21. 54
  22. 1078
  23. 190
  24. 294
  25. 72
  26. 266
  27. 90
  28. 343
  29. 539
  30. 377
  31. 190
  32. 36
  33. 490
  34. 435
  35. 27
  36. 266
  37. 297
  38. 539
  39. 135
  40. 435

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