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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 171 · 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. 1.35 × 98 =
  2. 2.10 × 9 =
  3. 3.26 × 98 =
  4. 4.15 × 19 =
  5. 5.7 × 19 =
  6. 6.22 × 98 =
  7. 7.5 × 29 =
  8. 8.9 × 9 =
  9. 9.9 × 9 =
  10. 10.4 × 49 =
  11. 11.4 × 29 =
  12. 12.10 × 99 =
  13. 13.7 × 9 =
  14. 14.10 × 98 =
  15. 15.4 × 19 =
  16. 16.14 × 29 =
  17. 17.9 × 49 =
  18. 18.19 × 99 =
  19. 19.6 × 98 =
  20. 20.25 × 99 =
  21. 21.7 × 49 =
  22. 22.21 × 99 =
  23. 23.3 × 49 =
  24. 24.7 × 49 =
  25. 25.7 × 19 =
  26. 26.9 × 19 =
  27. 27.6 × 9 =
  28. 28.8 × 9 =
  29. 29.8 × 9 =
  30. 30.13 × 19 =
  31. 31.13 × 19 =
  32. 32.5 × 98 =
  33. 33.9 × 29 =
  34. 34.3 × 9 =
  35. 35.15 × 49 =
  36. 36.13 × 19 =
  37. 37.8 × 9 =
  38. 38.6 × 19 =
  39. 39.6 × 49 =
  40. 40.10 × 49 =

Answer key

  1. 3430
  2. 90
  3. 2548
  4. 285
  5. 133
  6. 2156
  7. 145
  8. 81
  9. 81
  10. 196
  11. 116
  12. 990
  13. 63
  14. 980
  15. 76
  16. 406
  17. 441
  18. 1881
  19. 588
  20. 2475
  21. 343
  22. 2079
  23. 147
  24. 343
  25. 133
  26. 171
  27. 54
  28. 72
  29. 72
  30. 247
  31. 247
  32. 490
  33. 261
  34. 27
  35. 735
  36. 247
  37. 72
  38. 114
  39. 294
  40. 490

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