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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 183 · 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 × 9 =
  2. 2.13 × 29 =
  3. 3.12 × 98 =
  4. 4.4 × 19 =
  5. 5.8 × 49 =
  6. 6.8 × 9 =
  7. 7.5 × 9 =
  8. 8.16 × 98 =
  9. 9.13 × 49 =
  10. 10.14 × 29 =
  11. 11.5 × 9 =
  12. 12.13 × 19 =
  13. 13.12 × 99 =
  14. 14.12 × 29 =
  15. 15.27 × 98 =
  16. 16.4 × 29 =
  17. 17.6 × 98 =
  18. 18.8 × 99 =
  19. 19.13 × 98 =
  20. 20.10 × 19 =
  21. 21.6 × 98 =
  22. 22.25 × 99 =
  23. 23.6 × 19 =
  24. 24.6 × 29 =
  25. 25.4 × 49 =
  26. 26.13 × 9 =
  27. 27.5 × 49 =
  28. 28.9 × 49 =
  29. 29.12 × 49 =
  30. 30.4 × 49 =
  31. 31.34 × 99 =
  32. 32.12 × 49 =
  33. 33.34 × 99 =
  34. 34.3 × 9 =
  35. 35.14 × 29 =
  36. 36.30 × 98 =
  37. 37.21 × 99 =
  38. 38.4 × 49 =
  39. 39.15 × 29 =
  40. 40.9 × 19 =

Answer key

  1. 36
  2. 377
  3. 1176
  4. 76
  5. 392
  6. 72
  7. 45
  8. 1568
  9. 637
  10. 406
  11. 45
  12. 247
  13. 1188
  14. 348
  15. 2646
  16. 116
  17. 588
  18. 792
  19. 1274
  20. 190
  21. 588
  22. 2475
  23. 114
  24. 174
  25. 196
  26. 117
  27. 245
  28. 441
  29. 588
  30. 196
  31. 3366
  32. 588
  33. 3366
  34. 27
  35. 406
  36. 2940
  37. 2079
  38. 196
  39. 435
  40. 171

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