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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 680 · 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. 1.4 × 29 =
  2. 2.27 × 98 =
  3. 3.7 × 49 =
  4. 4.5 × 19 =
  5. 5.10 × 9 =
  6. 6.14 × 9 =
  7. 7.7 × 29 =
  8. 8.6 × 9 =
  9. 9.10 × 98 =
  10. 10.13 × 98 =
  11. 11.12 × 9 =
  12. 12.8 × 29 =
  13. 13.4 × 19 =
  14. 14.4 × 29 =
  15. 15.7 × 49 =
  16. 16.12 × 49 =
  17. 17.14 × 49 =
  18. 18.3 × 9 =
  19. 19.10 × 49 =
  20. 20.12 × 99 =
  21. 21.7 × 19 =
  22. 22.38 × 98 =
  23. 23.15 × 29 =
  24. 24.23 × 99 =
  25. 25.14 × 9 =
  26. 26.7 × 19 =
  27. 27.38 × 99 =
  28. 28.16 × 98 =
  29. 29.15 × 19 =
  30. 30.14 × 9 =
  31. 31.40 × 99 =
  32. 32.3 × 9 =
  33. 33.3 × 9 =
  34. 34.3 × 98 =
  35. 35.6 × 49 =
  36. 36.5 × 49 =
  37. 37.8 × 19 =
  38. 38.11 × 29 =
  39. 39.36 × 99 =
  40. 40.12 × 19 =

Answer key

  1. 116
  2. 2646
  3. 343
  4. 95
  5. 90
  6. 126
  7. 203
  8. 54
  9. 980
  10. 1274
  11. 108
  12. 232
  13. 76
  14. 116
  15. 343
  16. 588
  17. 686
  18. 27
  19. 490
  20. 1188
  21. 133
  22. 3724
  23. 435
  24. 2277
  25. 126
  26. 133
  27. 3762
  28. 1568
  29. 285
  30. 126
  31. 3960
  32. 27
  33. 27
  34. 294
  35. 294
  36. 245
  37. 152
  38. 319
  39. 3564
  40. 228

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