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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 488 · 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. 1.9 × 19 =
  2. 2.16 × 99 =
  3. 3.5 × 29 =
  4. 4.25 × 98 =
  5. 5.9 × 19 =
  6. 6.10 × 49 =
  7. 7.7 × 9 =
  8. 8.9 × 29 =
  9. 9.12 × 9 =
  10. 10.9 × 19 =
  11. 11.12 × 49 =
  12. 12.8 × 19 =
  13. 13.5 × 29 =
  14. 14.13 × 29 =
  15. 15.13 × 49 =
  16. 16.8 × 29 =
  17. 17.15 × 98 =
  18. 18.13 × 9 =
  19. 19.9 × 29 =
  20. 20.4 × 29 =
  21. 21.7 × 9 =
  22. 22.13 × 9 =
  23. 23.12 × 98 =
  24. 24.11 × 19 =
  25. 25.8 × 99 =
  26. 26.13 × 9 =
  27. 27.3 × 9 =
  28. 28.10 × 29 =
  29. 29.33 × 99 =
  30. 30.5 × 49 =
  31. 31.38 × 99 =
  32. 32.39 × 98 =
  33. 33.5 × 29 =
  34. 34.35 × 99 =
  35. 35.5 × 9 =
  36. 36.9 × 29 =
  37. 37.29 × 98 =
  38. 38.13 × 19 =
  39. 39.15 × 29 =
  40. 40.6 × 29 =

Answer key

  1. 171
  2. 1584
  3. 145
  4. 2450
  5. 171
  6. 490
  7. 63
  8. 261
  9. 108
  10. 171
  11. 588
  12. 152
  13. 145
  14. 377
  15. 637
  16. 232
  17. 1470
  18. 117
  19. 261
  20. 116
  21. 63
  22. 117
  23. 1176
  24. 209
  25. 792
  26. 117
  27. 27
  28. 290
  29. 3267
  30. 245
  31. 3762
  32. 3822
  33. 145
  34. 3465
  35. 45
  36. 261
  37. 2842
  38. 247
  39. 435
  40. 174

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