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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 261 · 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 × 29 =
  2. 2.4 × 49 =
  3. 3.12 × 19 =
  4. 4.7 × 49 =
  5. 5.4 × 19 =
  6. 6.11 × 19 =
  7. 7.26 × 99 =
  8. 8.40 × 98 =
  9. 9.4 × 49 =
  10. 10.4 × 9 =
  11. 11.10 × 9 =
  12. 12.15 × 29 =
  13. 13.12 × 49 =
  14. 14.5 × 9 =
  15. 15.40 × 98 =
  16. 16.7 × 19 =
  17. 17.9 × 9 =
  18. 18.3 × 99 =
  19. 19.4 × 19 =
  20. 20.12 × 29 =
  21. 21.26 × 98 =
  22. 22.8 × 29 =
  23. 23.4 × 19 =
  24. 24.12 × 19 =
  25. 25.8 × 99 =
  26. 26.21 × 99 =
  27. 27.39 × 98 =
  28. 28.30 × 99 =
  29. 29.12 × 98 =
  30. 30.12 × 19 =
  31. 31.5 × 99 =
  32. 32.14 × 9 =
  33. 33.9 × 98 =
  34. 34.31 × 99 =
  35. 35.11 × 19 =
  36. 36.15 × 19 =
  37. 37.11 × 49 =
  38. 38.5 × 19 =
  39. 39.9 × 29 =
  40. 40.4 × 9 =

Answer key

  1. 145
  2. 196
  3. 228
  4. 343
  5. 76
  6. 209
  7. 2574
  8. 3920
  9. 196
  10. 36
  11. 90
  12. 435
  13. 588
  14. 45
  15. 3920
  16. 133
  17. 81
  18. 297
  19. 76
  20. 348
  21. 2548
  22. 232
  23. 76
  24. 228
  25. 792
  26. 2079
  27. 3822
  28. 2970
  29. 1176
  30. 228
  31. 495
  32. 126
  33. 882
  34. 3069
  35. 209
  36. 285
  37. 539
  38. 95
  39. 261
  40. 36

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