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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 930 · 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. 1.6 × 9 =
  2. 2.13 × 49 =
  3. 3.4 × 19 =
  4. 4.7 × 98 =
  5. 5.13 × 9 =
  6. 6.3 × 9 =
  7. 7.15 × 9 =
  8. 8.11 × 9 =
  9. 9.8 × 9 =
  10. 10.15 × 29 =
  11. 11.10 × 9 =
  12. 12.31 × 99 =
  13. 13.32 × 99 =
  14. 14.4 × 49 =
  15. 15.7 × 19 =
  16. 16.10 × 19 =
  17. 17.15 × 49 =
  18. 18.4 × 9 =
  19. 19.39 × 98 =
  20. 20.4 × 9 =
  21. 21.14 × 19 =
  22. 22.6 × 99 =
  23. 23.13 × 49 =
  24. 24.10 × 29 =
  25. 25.13 × 19 =
  26. 26.10 × 9 =
  27. 27.11 × 19 =
  28. 28.6 × 29 =
  29. 29.11 × 19 =
  30. 30.28 × 98 =
  31. 31.3 × 19 =
  32. 32.11 × 29 =
  33. 33.3 × 19 =
  34. 34.3 × 9 =
  35. 35.11 × 9 =
  36. 36.5 × 98 =
  37. 37.14 × 19 =
  38. 38.13 × 29 =
  39. 39.8 × 99 =
  40. 40.34 × 99 =

Answer key

  1. 54
  2. 637
  3. 76
  4. 686
  5. 117
  6. 27
  7. 135
  8. 99
  9. 72
  10. 435
  11. 90
  12. 3069
  13. 3168
  14. 196
  15. 133
  16. 190
  17. 735
  18. 36
  19. 3822
  20. 36
  21. 266
  22. 594
  23. 637
  24. 290
  25. 247
  26. 90
  27. 209
  28. 174
  29. 209
  30. 2744
  31. 57
  32. 319
  33. 57
  34. 27
  35. 99
  36. 490
  37. 266
  38. 377
  39. 792
  40. 3366

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