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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 555 · 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 × 49 =
  2. 2.37 × 98 =
  3. 3.11 × 19 =
  4. 4.5 × 9 =
  5. 5.6 × 29 =
  6. 6.15 × 98 =
  7. 7.11 × 49 =
  8. 8.14 × 9 =
  9. 9.28 × 98 =
  10. 10.11 × 19 =
  11. 11.6 × 9 =
  12. 12.11 × 9 =
  13. 13.10 × 9 =
  14. 14.14 × 9 =
  15. 15.6 × 19 =
  16. 16.33 × 98 =
  17. 17.20 × 99 =
  18. 18.34 × 99 =
  19. 19.5 × 29 =
  20. 20.8 × 19 =
  21. 21.20 × 98 =
  22. 22.17 × 99 =
  23. 23.15 × 29 =
  24. 24.13 × 19 =
  25. 25.12 × 49 =
  26. 26.9 × 49 =
  27. 27.11 × 19 =
  28. 28.8 × 19 =
  29. 29.14 × 19 =
  30. 30.4 × 29 =
  31. 31.12 × 19 =
  32. 32.15 × 9 =
  33. 33.14 × 29 =
  34. 34.6 × 29 =
  35. 35.23 × 98 =
  36. 36.7 × 29 =
  37. 37.10 × 29 =
  38. 38.24 × 99 =
  39. 39.7 × 19 =
  40. 40.13 × 99 =

Answer key

  1. 441
  2. 3626
  3. 209
  4. 45
  5. 174
  6. 1470
  7. 539
  8. 126
  9. 2744
  10. 209
  11. 54
  12. 99
  13. 90
  14. 126
  15. 114
  16. 3234
  17. 1980
  18. 3366
  19. 145
  20. 152
  21. 1960
  22. 1683
  23. 435
  24. 247
  25. 588
  26. 441
  27. 209
  28. 152
  29. 266
  30. 116
  31. 228
  32. 135
  33. 406
  34. 174
  35. 2254
  36. 203
  37. 290
  38. 2376
  39. 133
  40. 1287

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