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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 344 · 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. 1.11 × 9 =
  2. 2.4 × 29 =
  3. 3.10 × 9 =
  4. 4.10 × 49 =
  5. 5.15 × 19 =
  6. 6.4 × 49 =
  7. 7.4 × 19 =
  8. 8.15 × 99 =
  9. 9.7 × 9 =
  10. 10.6 × 99 =
  11. 11.11 × 98 =
  12. 12.3 × 19 =
  13. 13.12 × 29 =
  14. 14.12 × 19 =
  15. 15.12 × 19 =
  16. 16.7 × 19 =
  17. 17.12 × 99 =
  18. 18.5 × 29 =
  19. 19.5 × 19 =
  20. 20.14 × 29 =
  21. 21.23 × 98 =
  22. 22.7 × 29 =
  23. 23.12 × 9 =
  24. 24.8 × 19 =
  25. 25.7 × 29 =
  26. 26.16 × 98 =
  27. 27.40 × 98 =
  28. 28.37 × 98 =
  29. 29.9 × 9 =
  30. 30.4 × 29 =
  31. 31.3 × 9 =
  32. 32.5 × 49 =
  33. 33.13 × 9 =
  34. 34.8 × 98 =
  35. 35.6 × 19 =
  36. 36.13 × 9 =
  37. 37.12 × 49 =
  38. 38.9 × 29 =
  39. 39.8 × 19 =
  40. 40.8 × 9 =

Answer key

  1. 99
  2. 116
  3. 90
  4. 490
  5. 285
  6. 196
  7. 76
  8. 1485
  9. 63
  10. 594
  11. 1078
  12. 57
  13. 348
  14. 228
  15. 228
  16. 133
  17. 1188
  18. 145
  19. 95
  20. 406
  21. 2254
  22. 203
  23. 108
  24. 152
  25. 203
  26. 1568
  27. 3920
  28. 3626
  29. 81
  30. 116
  31. 27
  32. 245
  33. 117
  34. 784
  35. 114
  36. 117
  37. 588
  38. 261
  39. 152
  40. 72

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