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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 937 · 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. 1.30 × 99 =
  2. 2.4 × 9 =
  3. 3.5 × 49 =
  4. 4.5 × 98 =
  5. 5.10 × 29 =
  6. 6.13 × 29 =
  7. 7.7 × 99 =
  8. 8.38 × 99 =
  9. 9.5 × 49 =
  10. 10.10 × 9 =
  11. 11.10 × 49 =
  12. 12.4 × 19 =
  13. 13.5 × 19 =
  14. 14.3 × 9 =
  15. 15.11 × 29 =
  16. 16.12 × 19 =
  17. 17.6 × 29 =
  18. 18.7 × 19 =
  19. 19.4 × 98 =
  20. 20.6 × 98 =
  21. 21.6 × 49 =
  22. 22.23 × 98 =
  23. 23.27 × 99 =
  24. 24.11 × 49 =
  25. 25.4 × 19 =
  26. 26.9 × 99 =
  27. 27.9 × 49 =
  28. 28.9 × 19 =
  29. 29.15 × 19 =
  30. 30.8 × 49 =
  31. 31.5 × 29 =
  32. 32.4 × 9 =
  33. 33.33 × 98 =
  34. 34.10 × 98 =
  35. 35.11 × 29 =
  36. 36.8 × 49 =
  37. 37.10 × 29 =
  38. 38.8 × 29 =
  39. 39.15 × 19 =
  40. 40.6 × 19 =

Answer key

  1. 2970
  2. 36
  3. 245
  4. 490
  5. 290
  6. 377
  7. 693
  8. 3762
  9. 245
  10. 90
  11. 490
  12. 76
  13. 95
  14. 27
  15. 319
  16. 228
  17. 174
  18. 133
  19. 392
  20. 588
  21. 294
  22. 2254
  23. 2673
  24. 539
  25. 76
  26. 891
  27. 441
  28. 171
  29. 285
  30. 392
  31. 145
  32. 36
  33. 3234
  34. 980
  35. 319
  36. 392
  37. 290
  38. 232
  39. 285
  40. 114

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