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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 625 · 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. 1.9 × 19 =
  2. 2.9 × 29 =
  3. 3.11 × 49 =
  4. 4.9 × 49 =
  5. 5.12 × 29 =
  6. 6.3 × 19 =
  7. 7.13 × 9 =
  8. 8.11 × 49 =
  9. 9.13 × 49 =
  10. 10.18 × 99 =
  11. 11.8 × 29 =
  12. 12.19 × 99 =
  13. 13.6 × 19 =
  14. 14.6 × 29 =
  15. 15.3 × 9 =
  16. 16.4 × 9 =
  17. 17.5 × 9 =
  18. 18.4 × 9 =
  19. 19.15 × 29 =
  20. 20.12 × 99 =
  21. 21.31 × 99 =
  22. 22.27 × 99 =
  23. 23.10 × 99 =
  24. 24.13 × 98 =
  25. 25.21 × 99 =
  26. 26.13 × 9 =
  27. 27.4 × 49 =
  28. 28.14 × 98 =
  29. 29.15 × 49 =
  30. 30.10 × 99 =
  31. 31.17 × 99 =
  32. 32.9 × 9 =
  33. 33.23 × 99 =
  34. 34.14 × 9 =
  35. 35.12 × 98 =
  36. 36.11 × 99 =
  37. 37.23 × 98 =
  38. 38.13 × 9 =
  39. 39.8 × 9 =
  40. 40.25 × 99 =

Answer key

  1. 171
  2. 261
  3. 539
  4. 441
  5. 348
  6. 57
  7. 117
  8. 539
  9. 637
  10. 1782
  11. 232
  12. 1881
  13. 114
  14. 174
  15. 27
  16. 36
  17. 45
  18. 36
  19. 435
  20. 1188
  21. 3069
  22. 2673
  23. 990
  24. 1274
  25. 2079
  26. 117
  27. 196
  28. 1372
  29. 735
  30. 990
  31. 1683
  32. 81
  33. 2277
  34. 126
  35. 1176
  36. 1089
  37. 2254
  38. 117
  39. 72
  40. 2475

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