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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 92 · 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. 1.14 × 49 =
  2. 2.12 × 19 =
  3. 3.5 × 49 =
  4. 4.35 × 99 =
  5. 5.12 × 9 =
  6. 6.8 × 19 =
  7. 7.6 × 19 =
  8. 8.38 × 98 =
  9. 9.15 × 29 =
  10. 10.3 × 9 =
  11. 11.12 × 49 =
  12. 12.33 × 98 =
  13. 13.36 × 98 =
  14. 14.3 × 9 =
  15. 15.5 × 99 =
  16. 16.7 × 29 =
  17. 17.36 × 98 =
  18. 18.7 × 19 =
  19. 19.15 × 9 =
  20. 20.31 × 98 =
  21. 21.4 × 19 =
  22. 22.7 × 29 =
  23. 23.25 × 98 =
  24. 24.31 × 99 =
  25. 25.4 × 49 =
  26. 26.10 × 19 =
  27. 27.6 × 29 =
  28. 28.5 × 99 =
  29. 29.6 × 19 =
  30. 30.27 × 99 =
  31. 31.19 × 98 =
  32. 32.14 × 9 =
  33. 33.7 × 49 =
  34. 34.14 × 19 =
  35. 35.6 × 19 =
  36. 36.10 × 49 =
  37. 37.10 × 29 =
  38. 38.10 × 19 =
  39. 39.17 × 98 =
  40. 40.4 × 49 =

Answer key

  1. 686
  2. 228
  3. 245
  4. 3465
  5. 108
  6. 152
  7. 114
  8. 3724
  9. 435
  10. 27
  11. 588
  12. 3234
  13. 3528
  14. 27
  15. 495
  16. 203
  17. 3528
  18. 133
  19. 135
  20. 3038
  21. 76
  22. 203
  23. 2450
  24. 3069
  25. 196
  26. 190
  27. 174
  28. 495
  29. 114
  30. 2673
  31. 1862
  32. 126
  33. 343
  34. 266
  35. 114
  36. 490
  37. 290
  38. 190
  39. 1666
  40. 196

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