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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 978 · 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. 1.5 × 98 =
  2. 2.14 × 49 =
  3. 3.19 × 99 =
  4. 4.8 × 9 =
  5. 5.12 × 99 =
  6. 6.13 × 19 =
  7. 7.8 × 49 =
  8. 8.14 × 9 =
  9. 9.8 × 29 =
  10. 10.31 × 99 =
  11. 11.5 × 19 =
  12. 12.10 × 29 =
  13. 13.6 × 98 =
  14. 14.3 × 99 =
  15. 15.19 × 99 =
  16. 16.8 × 49 =
  17. 17.10 × 99 =
  18. 18.37 × 98 =
  19. 19.13 × 9 =
  20. 20.4 × 49 =
  21. 21.14 × 29 =
  22. 22.30 × 98 =
  23. 23.14 × 29 =
  24. 24.11 × 29 =
  25. 25.12 × 19 =
  26. 26.40 × 99 =
  27. 27.39 × 98 =
  28. 28.4 × 49 =
  29. 29.25 × 98 =
  30. 30.5 × 9 =
  31. 31.16 × 98 =
  32. 32.4 × 19 =
  33. 33.10 × 98 =
  34. 34.10 × 29 =
  35. 35.26 × 98 =
  36. 36.28 × 99 =
  37. 37.15 × 99 =
  38. 38.14 × 49 =
  39. 39.5 × 9 =
  40. 40.4 × 19 =

Answer key

  1. 490
  2. 686
  3. 1881
  4. 72
  5. 1188
  6. 247
  7. 392
  8. 126
  9. 232
  10. 3069
  11. 95
  12. 290
  13. 588
  14. 297
  15. 1881
  16. 392
  17. 990
  18. 3626
  19. 117
  20. 196
  21. 406
  22. 2940
  23. 406
  24. 319
  25. 228
  26. 3960
  27. 3822
  28. 196
  29. 2450
  30. 45
  31. 1568
  32. 76
  33. 980
  34. 290
  35. 2548
  36. 2772
  37. 1485
  38. 686
  39. 45
  40. 76

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