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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 4 · 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 × 19 =
  2. 2.5 × 99 =
  3. 3.8 × 49 =
  4. 4.7 × 9 =
  5. 5.6 × 29 =
  6. 6.31 × 98 =
  7. 7.12 × 29 =
  8. 8.12 × 99 =
  9. 9.3 × 9 =
  10. 10.8 × 49 =
  11. 11.40 × 98 =
  12. 12.4 × 49 =
  13. 13.3 × 49 =
  14. 14.5 × 19 =
  15. 15.7 × 9 =
  16. 16.3 × 98 =
  17. 17.13 × 99 =
  18. 18.9 × 19 =
  19. 19.24 × 99 =
  20. 20.6 × 19 =
  21. 21.39 × 98 =
  22. 22.9 × 98 =
  23. 23.12 × 29 =
  24. 24.3 × 9 =
  25. 25.9 × 9 =
  26. 26.15 × 29 =
  27. 27.8 × 29 =
  28. 28.6 × 29 =
  29. 29.12 × 9 =
  30. 30.32 × 98 =
  31. 31.6 × 99 =
  32. 32.6 × 9 =
  33. 33.8 × 9 =
  34. 34.12 × 19 =
  35. 35.9 × 29 =
  36. 36.6 × 49 =
  37. 37.7 × 19 =
  38. 38.14 × 19 =
  39. 39.6 × 49 =
  40. 40.5 × 19 =

Answer key

  1. 133
  2. 495
  3. 392
  4. 63
  5. 174
  6. 3038
  7. 348
  8. 1188
  9. 27
  10. 392
  11. 3920
  12. 196
  13. 147
  14. 95
  15. 63
  16. 294
  17. 1287
  18. 171
  19. 2376
  20. 114
  21. 3822
  22. 882
  23. 348
  24. 27
  25. 81
  26. 435
  27. 232
  28. 174
  29. 108
  30. 3136
  31. 594
  32. 54
  33. 72
  34. 228
  35. 261
  36. 294
  37. 133
  38. 266
  39. 294
  40. 95

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