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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 619 · 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. 1.21 × 99 =
  2. 2.10 × 9 =
  3. 3.7 × 99 =
  4. 4.11 × 29 =
  5. 5.38 × 99 =
  6. 6.5 × 19 =
  7. 7.6 × 9 =
  8. 8.17 × 98 =
  9. 9.3 × 98 =
  10. 10.3 × 9 =
  11. 11.14 × 9 =
  12. 12.6 × 19 =
  13. 13.12 × 19 =
  14. 14.15 × 49 =
  15. 15.3 × 49 =
  16. 16.6 × 49 =
  17. 17.31 × 98 =
  18. 18.11 × 19 =
  19. 19.39 × 98 =
  20. 20.17 × 99 =
  21. 21.5 × 19 =
  22. 22.11 × 49 =
  23. 23.40 × 99 =
  24. 24.6 × 29 =
  25. 25.4 × 9 =
  26. 26.15 × 19 =
  27. 27.3 × 49 =
  28. 28.6 × 49 =
  29. 29.5 × 99 =
  30. 30.22 × 98 =
  31. 31.4 × 99 =
  32. 32.5 × 49 =
  33. 33.8 × 9 =
  34. 34.24 × 99 =
  35. 35.13 × 19 =
  36. 36.10 × 19 =
  37. 37.13 × 9 =
  38. 38.9 × 99 =
  39. 39.8 × 49 =
  40. 40.10 × 49 =

Answer key

  1. 2079
  2. 90
  3. 693
  4. 319
  5. 3762
  6. 95
  7. 54
  8. 1666
  9. 294
  10. 27
  11. 126
  12. 114
  13. 228
  14. 735
  15. 147
  16. 294
  17. 3038
  18. 209
  19. 3822
  20. 1683
  21. 95
  22. 539
  23. 3960
  24. 174
  25. 36
  26. 285
  27. 147
  28. 294
  29. 495
  30. 2156
  31. 396
  32. 245
  33. 72
  34. 2376
  35. 247
  36. 190
  37. 117
  38. 891
  39. 392
  40. 490

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