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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 827 · 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. 1.10 × 9 =
  2. 2.30 × 98 =
  3. 3.9 × 29 =
  4. 4.14 × 29 =
  5. 5.3 × 9 =
  6. 6.12 × 99 =
  7. 7.8 × 9 =
  8. 8.35 × 99 =
  9. 9.5 × 99 =
  10. 10.8 × 29 =
  11. 11.12 × 49 =
  12. 12.13 × 29 =
  13. 13.15 × 98 =
  14. 14.6 × 19 =
  15. 15.10 × 98 =
  16. 16.11 × 49 =
  17. 17.9 × 49 =
  18. 18.4 × 9 =
  19. 19.13 × 29 =
  20. 20.14 × 29 =
  21. 21.9 × 29 =
  22. 22.3 × 9 =
  23. 23.11 × 19 =
  24. 24.4 × 49 =
  25. 25.29 × 98 =
  26. 26.9 × 19 =
  27. 27.17 × 98 =
  28. 28.8 × 19 =
  29. 29.7 × 19 =
  30. 30.8 × 29 =
  31. 31.8 × 19 =
  32. 32.10 × 9 =
  33. 33.10 × 98 =
  34. 34.4 × 49 =
  35. 35.5 × 9 =
  36. 36.23 × 99 =
  37. 37.12 × 19 =
  38. 38.10 × 9 =
  39. 39.11 × 29 =
  40. 40.3 × 29 =

Answer key

  1. 90
  2. 2940
  3. 261
  4. 406
  5. 27
  6. 1188
  7. 72
  8. 3465
  9. 495
  10. 232
  11. 588
  12. 377
  13. 1470
  14. 114
  15. 980
  16. 539
  17. 441
  18. 36
  19. 377
  20. 406
  21. 261
  22. 27
  23. 209
  24. 196
  25. 2842
  26. 171
  27. 1666
  28. 152
  29. 133
  30. 232
  31. 152
  32. 90
  33. 980
  34. 196
  35. 45
  36. 2277
  37. 228
  38. 90
  39. 319
  40. 87

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