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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 170 · 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. 1.40 × 98 =
  2. 2.14 × 19 =
  3. 3.4 × 49 =
  4. 4.5 × 9 =
  5. 5.28 × 98 =
  6. 6.19 × 99 =
  7. 7.16 × 98 =
  8. 8.4 × 29 =
  9. 9.9 × 19 =
  10. 10.12 × 19 =
  11. 11.3 × 19 =
  12. 12.12 × 49 =
  13. 13.15 × 49 =
  14. 14.40 × 98 =
  15. 15.11 × 19 =
  16. 16.13 × 19 =
  17. 17.37 × 98 =
  18. 18.12 × 49 =
  19. 19.8 × 29 =
  20. 20.33 × 99 =
  21. 21.9 × 29 =
  22. 22.14 × 98 =
  23. 23.4 × 29 =
  24. 24.12 × 29 =
  25. 25.5 × 49 =
  26. 26.17 × 98 =
  27. 27.36 × 98 =
  28. 28.7 × 9 =
  29. 29.5 × 99 =
  30. 30.8 × 29 =
  31. 31.5 × 19 =
  32. 32.9 × 98 =
  33. 33.5 × 9 =
  34. 34.4 × 29 =
  35. 35.9 × 49 =
  36. 36.3 × 9 =
  37. 37.11 × 49 =
  38. 38.4 × 98 =
  39. 39.24 × 99 =
  40. 40.34 × 99 =

Answer key

  1. 3920
  2. 266
  3. 196
  4. 45
  5. 2744
  6. 1881
  7. 1568
  8. 116
  9. 171
  10. 228
  11. 57
  12. 588
  13. 735
  14. 3920
  15. 209
  16. 247
  17. 3626
  18. 588
  19. 232
  20. 3267
  21. 261
  22. 1372
  23. 116
  24. 348
  25. 245
  26. 1666
  27. 3528
  28. 63
  29. 495
  30. 232
  31. 95
  32. 882
  33. 45
  34. 116
  35. 441
  36. 27
  37. 539
  38. 392
  39. 2376
  40. 3366

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