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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 21 · 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. 1.7 × 9 =
  2. 2.28 × 98 =
  3. 3.13 × 9 =
  4. 4.14 × 19 =
  5. 5.28 × 98 =
  6. 6.5 × 19 =
  7. 7.13 × 29 =
  8. 8.10 × 98 =
  9. 9.9 × 29 =
  10. 10.11 × 29 =
  11. 11.7 × 19 =
  12. 12.8 × 9 =
  13. 13.32 × 99 =
  14. 14.10 × 98 =
  15. 15.30 × 98 =
  16. 16.30 × 98 =
  17. 17.3 × 19 =
  18. 18.11 × 49 =
  19. 19.12 × 9 =
  20. 20.8 × 19 =
  21. 21.9 × 19 =
  22. 22.13 × 9 =
  23. 23.13 × 99 =
  24. 24.6 × 19 =
  25. 25.6 × 19 =
  26. 26.15 × 9 =
  27. 27.13 × 29 =
  28. 28.12 × 49 =
  29. 29.11 × 29 =
  30. 30.11 × 19 =
  31. 31.4 × 49 =
  32. 32.37 × 98 =
  33. 33.14 × 49 =
  34. 34.38 × 99 =
  35. 35.6 × 49 =
  36. 36.9 × 19 =
  37. 37.15 × 9 =
  38. 38.6 × 49 =
  39. 39.12 × 49 =
  40. 40.11 × 9 =

Answer key

  1. 63
  2. 2744
  3. 117
  4. 266
  5. 2744
  6. 95
  7. 377
  8. 980
  9. 261
  10. 319
  11. 133
  12. 72
  13. 3168
  14. 980
  15. 2940
  16. 2940
  17. 57
  18. 539
  19. 108
  20. 152
  21. 171
  22. 117
  23. 1287
  24. 114
  25. 114
  26. 135
  27. 377
  28. 588
  29. 319
  30. 209
  31. 196
  32. 3626
  33. 686
  34. 3762
  35. 294
  36. 171
  37. 135
  38. 294
  39. 588
  40. 99

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