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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 351 · 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. 1.6 × 9 =
  2. 2.7 × 19 =
  3. 3.13 × 19 =
  4. 4.5 × 29 =
  5. 5.7 × 99 =
  6. 6.10 × 19 =
  7. 7.6 × 29 =
  8. 8.15 × 49 =
  9. 9.31 × 98 =
  10. 10.8 × 49 =
  11. 11.9 × 19 =
  12. 12.15 × 19 =
  13. 13.5 × 19 =
  14. 14.9 × 19 =
  15. 15.3 × 49 =
  16. 16.13 × 9 =
  17. 17.4 × 19 =
  18. 18.8 × 49 =
  19. 19.11 × 9 =
  20. 20.4 × 49 =
  21. 21.13 × 99 =
  22. 22.5 × 49 =
  23. 23.12 × 49 =
  24. 24.3 × 99 =
  25. 25.6 × 19 =
  26. 26.33 × 98 =
  27. 27.8 × 29 =
  28. 28.6 × 9 =
  29. 29.4 × 98 =
  30. 30.10 × 49 =
  31. 31.15 × 29 =
  32. 32.18 × 99 =
  33. 33.8 × 29 =
  34. 34.8 × 19 =
  35. 35.15 × 9 =
  36. 36.8 × 19 =
  37. 37.30 × 99 =
  38. 38.8 × 29 =
  39. 39.7 × 19 =
  40. 40.14 × 29 =

Answer key

  1. 54
  2. 133
  3. 247
  4. 145
  5. 693
  6. 190
  7. 174
  8. 735
  9. 3038
  10. 392
  11. 171
  12. 285
  13. 95
  14. 171
  15. 147
  16. 117
  17. 76
  18. 392
  19. 99
  20. 196
  21. 1287
  22. 245
  23. 588
  24. 297
  25. 114
  26. 3234
  27. 232
  28. 54
  29. 392
  30. 490
  31. 435
  32. 1782
  33. 232
  34. 152
  35. 135
  36. 152
  37. 2970
  38. 232
  39. 133
  40. 406

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