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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 143 · 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. 1.8 × 19 =
  2. 2.3 × 29 =
  3. 3.10 × 19 =
  4. 4.4 × 29 =
  5. 5.5 × 49 =
  6. 6.4 × 29 =
  7. 7.3 × 29 =
  8. 8.15 × 29 =
  9. 9.13 × 29 =
  10. 10.16 × 99 =
  11. 11.5 × 49 =
  12. 12.4 × 98 =
  13. 13.4 × 19 =
  14. 14.15 × 19 =
  15. 15.6 × 9 =
  16. 16.4 × 49 =
  17. 17.38 × 99 =
  18. 18.14 × 9 =
  19. 19.8 × 49 =
  20. 20.34 × 98 =
  21. 21.10 × 29 =
  22. 22.8 × 98 =
  23. 23.9 × 49 =
  24. 24.6 × 9 =
  25. 25.3 × 98 =
  26. 26.4 × 9 =
  27. 27.7 × 98 =
  28. 28.5 × 9 =
  29. 29.15 × 19 =
  30. 30.11 × 9 =
  31. 31.37 × 98 =
  32. 32.15 × 29 =
  33. 33.8 × 19 =
  34. 34.5 × 19 =
  35. 35.13 × 19 =
  36. 36.7 × 19 =
  37. 37.11 × 99 =
  38. 38.34 × 98 =
  39. 39.12 × 9 =
  40. 40.8 × 9 =

Answer key

  1. 152
  2. 87
  3. 190
  4. 116
  5. 245
  6. 116
  7. 87
  8. 435
  9. 377
  10. 1584
  11. 245
  12. 392
  13. 76
  14. 285
  15. 54
  16. 196
  17. 3762
  18. 126
  19. 392
  20. 3332
  21. 290
  22. 784
  23. 441
  24. 54
  25. 294
  26. 36
  27. 686
  28. 45
  29. 285
  30. 99
  31. 3626
  32. 435
  33. 152
  34. 95
  35. 247
  36. 133
  37. 1089
  38. 3332
  39. 108
  40. 72

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