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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 624 · 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 × 9 =
  2. 2.15 × 9 =
  3. 3.12 × 49 =
  4. 4.38 × 99 =
  5. 5.8 × 9 =
  6. 6.8 × 19 =
  7. 7.3 × 9 =
  8. 8.6 × 9 =
  9. 9.13 × 9 =
  10. 10.11 × 49 =
  11. 11.7 × 99 =
  12. 12.3 × 9 =
  13. 13.6 × 29 =
  14. 14.4 × 29 =
  15. 15.36 × 98 =
  16. 16.15 × 98 =
  17. 17.15 × 19 =
  18. 18.39 × 99 =
  19. 19.15 × 19 =
  20. 20.22 × 99 =
  21. 21.10 × 99 =
  22. 22.6 × 9 =
  23. 23.9 × 29 =
  24. 24.10 × 19 =
  25. 25.12 × 19 =
  26. 26.6 × 49 =
  27. 27.10 × 49 =
  28. 28.10 × 9 =
  29. 29.31 × 98 =
  30. 30.4 × 19 =
  31. 31.5 × 99 =
  32. 32.4 × 9 =
  33. 33.11 × 19 =
  34. 34.14 × 9 =
  35. 35.15 × 9 =
  36. 36.15 × 29 =
  37. 37.11 × 49 =
  38. 38.4 × 49 =
  39. 39.35 × 99 =
  40. 40.6 × 29 =

Answer key

  1. 27
  2. 135
  3. 588
  4. 3762
  5. 72
  6. 152
  7. 27
  8. 54
  9. 117
  10. 539
  11. 693
  12. 27
  13. 174
  14. 116
  15. 3528
  16. 1470
  17. 285
  18. 3861
  19. 285
  20. 2178
  21. 990
  22. 54
  23. 261
  24. 190
  25. 228
  26. 294
  27. 490
  28. 90
  29. 3038
  30. 76
  31. 495
  32. 36
  33. 209
  34. 126
  35. 135
  36. 435
  37. 539
  38. 196
  39. 3465
  40. 174

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