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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 644 · 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. 1.39 × 98 =
  2. 2.6 × 9 =
  3. 3.7 × 9 =
  4. 4.5 × 9 =
  5. 5.4 × 9 =
  6. 6.25 × 99 =
  7. 7.20 × 98 =
  8. 8.12 × 98 =
  9. 9.9 × 9 =
  10. 10.7 × 9 =
  11. 11.4 × 9 =
  12. 12.14 × 19 =
  13. 13.9 × 29 =
  14. 14.14 × 19 =
  15. 15.12 × 49 =
  16. 16.10 × 29 =
  17. 17.12 × 29 =
  18. 18.31 × 99 =
  19. 19.9 × 29 =
  20. 20.5 × 19 =
  21. 21.17 × 98 =
  22. 22.4 × 49 =
  23. 23.10 × 19 =
  24. 24.7 × 98 =
  25. 25.4 × 98 =
  26. 26.10 × 9 =
  27. 27.13 × 49 =
  28. 28.5 × 29 =
  29. 29.15 × 29 =
  30. 30.10 × 9 =
  31. 31.6 × 98 =
  32. 32.7 × 49 =
  33. 33.37 × 98 =
  34. 34.7 × 19 =
  35. 35.7 × 49 =
  36. 36.6 × 29 =
  37. 37.3 × 19 =
  38. 38.12 × 29 =
  39. 39.13 × 19 =
  40. 40.15 × 19 =

Answer key

  1. 3822
  2. 54
  3. 63
  4. 45
  5. 36
  6. 2475
  7. 1960
  8. 1176
  9. 81
  10. 63
  11. 36
  12. 266
  13. 261
  14. 266
  15. 588
  16. 290
  17. 348
  18. 3069
  19. 261
  20. 95
  21. 1666
  22. 196
  23. 190
  24. 686
  25. 392
  26. 90
  27. 637
  28. 145
  29. 435
  30. 90
  31. 588
  32. 343
  33. 3626
  34. 133
  35. 343
  36. 174
  37. 57
  38. 348
  39. 247
  40. 285

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