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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 654 · 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. 1.3 × 19 =
  2. 2.8 × 99 =
  3. 3.14 × 99 =
  4. 4.13 × 29 =
  5. 5.14 × 99 =
  6. 6.9 × 19 =
  7. 7.15 × 9 =
  8. 8.13 × 19 =
  9. 9.7 × 19 =
  10. 10.9 × 29 =
  11. 11.36 × 98 =
  12. 12.5 × 9 =
  13. 13.6 × 29 =
  14. 14.9 × 49 =
  15. 15.40 × 99 =
  16. 16.10 × 99 =
  17. 17.8 × 9 =
  18. 18.12 × 9 =
  19. 19.6 × 19 =
  20. 20.14 × 29 =
  21. 21.6 × 9 =
  22. 22.9 × 29 =
  23. 23.10 × 19 =
  24. 24.13 × 98 =
  25. 25.4 × 19 =
  26. 26.11 × 19 =
  27. 27.9 × 9 =
  28. 28.3 × 19 =
  29. 29.8 × 29 =
  30. 30.13 × 29 =
  31. 31.4 × 19 =
  32. 32.3 × 9 =
  33. 33.11 × 98 =
  34. 34.22 × 98 =
  35. 35.30 × 99 =
  36. 36.6 × 9 =
  37. 37.5 × 49 =
  38. 38.15 × 19 =
  39. 39.11 × 49 =
  40. 40.3 × 49 =

Answer key

  1. 57
  2. 792
  3. 1386
  4. 377
  5. 1386
  6. 171
  7. 135
  8. 247
  9. 133
  10. 261
  11. 3528
  12. 45
  13. 174
  14. 441
  15. 3960
  16. 990
  17. 72
  18. 108
  19. 114
  20. 406
  21. 54
  22. 261
  23. 190
  24. 1274
  25. 76
  26. 209
  27. 81
  28. 57
  29. 232
  30. 377
  31. 76
  32. 27
  33. 1078
  34. 2156
  35. 2970
  36. 54
  37. 245
  38. 285
  39. 539
  40. 147

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