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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 312 · 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. 1.18 × 98 =
  2. 2.13 × 98 =
  3. 3.3 × 49 =
  4. 4.11 × 19 =
  5. 5.23 × 99 =
  6. 6.8 × 19 =
  7. 7.11 × 9 =
  8. 8.3 × 49 =
  9. 9.14 × 9 =
  10. 10.10 × 49 =
  11. 11.7 × 49 =
  12. 12.11 × 9 =
  13. 13.4 × 9 =
  14. 14.8 × 29 =
  15. 15.7 × 29 =
  16. 16.7 × 29 =
  17. 17.26 × 98 =
  18. 18.3 × 9 =
  19. 19.6 × 9 =
  20. 20.10 × 29 =
  21. 21.12 × 9 =
  22. 22.12 × 99 =
  23. 23.25 × 98 =
  24. 24.5 × 19 =
  25. 25.13 × 29 =
  26. 26.10 × 9 =
  27. 27.11 × 29 =
  28. 28.31 × 99 =
  29. 29.9 × 29 =
  30. 30.13 × 9 =
  31. 31.12 × 9 =
  32. 32.24 × 99 =
  33. 33.12 × 9 =
  34. 34.5 × 19 =
  35. 35.4 × 98 =
  36. 36.12 × 9 =
  37. 37.15 × 9 =
  38. 38.38 × 98 =
  39. 39.8 × 29 =
  40. 40.13 × 29 =

Answer key

  1. 1764
  2. 1274
  3. 147
  4. 209
  5. 2277
  6. 152
  7. 99
  8. 147
  9. 126
  10. 490
  11. 343
  12. 99
  13. 36
  14. 232
  15. 203
  16. 203
  17. 2548
  18. 27
  19. 54
  20. 290
  21. 108
  22. 1188
  23. 2450
  24. 95
  25. 377
  26. 90
  27. 319
  28. 3069
  29. 261
  30. 117
  31. 108
  32. 2376
  33. 108
  34. 95
  35. 392
  36. 108
  37. 135
  38. 3724
  39. 232
  40. 377

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