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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 890 · 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. 1.4 × 49 =
  2. 2.8 × 99 =
  3. 3.13 × 19 =
  4. 4.36 × 98 =
  5. 5.9 × 98 =
  6. 6.15 × 19 =
  7. 7.7 × 29 =
  8. 8.24 × 99 =
  9. 9.6 × 9 =
  10. 10.14 × 19 =
  11. 11.7 × 9 =
  12. 12.4 × 29 =
  13. 13.5 × 29 =
  14. 14.10 × 9 =
  15. 15.14 × 49 =
  16. 16.8 × 9 =
  17. 17.12 × 19 =
  18. 18.4 × 19 =
  19. 19.6 × 49 =
  20. 20.40 × 98 =
  21. 21.7 × 19 =
  22. 22.15 × 99 =
  23. 23.13 × 49 =
  24. 24.6 × 98 =
  25. 25.9 × 9 =
  26. 26.8 × 9 =
  27. 27.7 × 19 =
  28. 28.10 × 19 =
  29. 29.5 × 9 =
  30. 30.13 × 9 =
  31. 31.16 × 98 =
  32. 32.12 × 49 =
  33. 33.7 × 9 =
  34. 34.11 × 9 =
  35. 35.10 × 99 =
  36. 36.11 × 98 =
  37. 37.8 × 9 =
  38. 38.5 × 49 =
  39. 39.5 × 29 =
  40. 40.5 × 9 =

Answer key

  1. 196
  2. 792
  3. 247
  4. 3528
  5. 882
  6. 285
  7. 203
  8. 2376
  9. 54
  10. 266
  11. 63
  12. 116
  13. 145
  14. 90
  15. 686
  16. 72
  17. 228
  18. 76
  19. 294
  20. 3920
  21. 133
  22. 1485
  23. 637
  24. 588
  25. 81
  26. 72
  27. 133
  28. 190
  29. 45
  30. 117
  31. 1568
  32. 588
  33. 63
  34. 99
  35. 990
  36. 1078
  37. 72
  38. 245
  39. 145
  40. 45

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