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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 708 · 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. 1.5 × 99 =
  2. 2.4 × 98 =
  3. 3.5 × 49 =
  4. 4.5 × 19 =
  5. 5.13 × 29 =
  6. 6.4 × 9 =
  7. 7.7 × 19 =
  8. 8.30 × 99 =
  9. 9.5 × 19 =
  10. 10.25 × 98 =
  11. 11.7 × 99 =
  12. 12.5 × 9 =
  13. 13.8 × 9 =
  14. 14.6 × 19 =
  15. 15.4 × 9 =
  16. 16.17 × 99 =
  17. 17.15 × 49 =
  18. 18.29 × 98 =
  19. 19.15 × 29 =
  20. 20.8 × 19 =
  21. 21.15 × 19 =
  22. 22.10 × 98 =
  23. 23.13 × 19 =
  24. 24.4 × 29 =
  25. 25.37 × 99 =
  26. 26.6 × 49 =
  27. 27.7 × 9 =
  28. 28.5 × 9 =
  29. 29.9 × 9 =
  30. 30.15 × 9 =
  31. 31.3 × 9 =
  32. 32.4 × 29 =
  33. 33.25 × 99 =
  34. 34.17 × 99 =
  35. 35.13 × 49 =
  36. 36.14 × 19 =
  37. 37.5 × 9 =
  38. 38.10 × 98 =
  39. 39.14 × 9 =
  40. 40.13 × 19 =

Answer key

  1. 495
  2. 392
  3. 245
  4. 95
  5. 377
  6. 36
  7. 133
  8. 2970
  9. 95
  10. 2450
  11. 693
  12. 45
  13. 72
  14. 114
  15. 36
  16. 1683
  17. 735
  18. 2842
  19. 435
  20. 152
  21. 285
  22. 980
  23. 247
  24. 116
  25. 3663
  26. 294
  27. 63
  28. 45
  29. 81
  30. 135
  31. 27
  32. 116
  33. 2475
  34. 1683
  35. 637
  36. 266
  37. 45
  38. 980
  39. 126
  40. 247

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