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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 202 · 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. 1.8 × 9 =
  2. 2.33 × 99 =
  3. 3.11 × 49 =
  4. 4.12 × 99 =
  5. 5.11 × 9 =
  6. 6.15 × 29 =
  7. 7.32 × 99 =
  8. 8.13 × 9 =
  9. 9.15 × 9 =
  10. 10.5 × 49 =
  11. 11.15 × 9 =
  12. 12.20 × 99 =
  13. 13.15 × 19 =
  14. 14.5 × 19 =
  15. 15.15 × 9 =
  16. 16.11 × 29 =
  17. 17.11 × 29 =
  18. 18.15 × 49 =
  19. 19.5 × 9 =
  20. 20.36 × 98 =
  21. 21.11 × 19 =
  22. 22.13 × 49 =
  23. 23.9 × 19 =
  24. 24.3 × 19 =
  25. 25.9 × 19 =
  26. 26.6 × 9 =
  27. 27.5 × 9 =
  28. 28.10 × 29 =
  29. 29.8 × 9 =
  30. 30.4 × 9 =
  31. 31.13 × 19 =
  32. 32.38 × 98 =
  33. 33.35 × 98 =
  34. 34.5 × 98 =
  35. 35.18 × 99 =
  36. 36.9 × 19 =
  37. 37.14 × 19 =
  38. 38.12 × 19 =
  39. 39.11 × 19 =
  40. 40.12 × 49 =

Answer key

  1. 72
  2. 3267
  3. 539
  4. 1188
  5. 99
  6. 435
  7. 3168
  8. 117
  9. 135
  10. 245
  11. 135
  12. 1980
  13. 285
  14. 95
  15. 135
  16. 319
  17. 319
  18. 735
  19. 45
  20. 3528
  21. 209
  22. 637
  23. 171
  24. 57
  25. 171
  26. 54
  27. 45
  28. 290
  29. 72
  30. 36
  31. 247
  32. 3724
  33. 3430
  34. 490
  35. 1782
  36. 171
  37. 266
  38. 228
  39. 209
  40. 588

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