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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 740 · 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. 1.15 × 49 =
  2. 2.15 × 29 =
  3. 3.15 × 19 =
  4. 4.11 × 49 =
  5. 5.15 × 99 =
  6. 6.8 × 9 =
  7. 7.9 × 29 =
  8. 8.32 × 98 =
  9. 9.5 × 99 =
  10. 10.25 × 99 =
  11. 11.30 × 98 =
  12. 12.5 × 99 =
  13. 13.9 × 29 =
  14. 14.12 × 19 =
  15. 15.12 × 98 =
  16. 16.5 × 49 =
  17. 17.5 × 99 =
  18. 18.3 × 9 =
  19. 19.4 × 29 =
  20. 20.12 × 19 =
  21. 21.5 × 19 =
  22. 22.12 × 99 =
  23. 23.10 × 19 =
  24. 24.18 × 99 =
  25. 25.6 × 99 =
  26. 26.6 × 9 =
  27. 27.14 × 49 =
  28. 28.11 × 19 =
  29. 29.8 × 99 =
  30. 30.16 × 99 =
  31. 31.6 × 98 =
  32. 32.34 × 98 =
  33. 33.25 × 98 =
  34. 34.5 × 98 =
  35. 35.7 × 29 =
  36. 36.8 × 19 =
  37. 37.6 × 19 =
  38. 38.4 × 9 =
  39. 39.15 × 19 =
  40. 40.14 × 29 =

Answer key

  1. 735
  2. 435
  3. 285
  4. 539
  5. 1485
  6. 72
  7. 261
  8. 3136
  9. 495
  10. 2475
  11. 2940
  12. 495
  13. 261
  14. 228
  15. 1176
  16. 245
  17. 495
  18. 27
  19. 116
  20. 228
  21. 95
  22. 1188
  23. 190
  24. 1782
  25. 594
  26. 54
  27. 686
  28. 209
  29. 792
  30. 1584
  31. 588
  32. 3332
  33. 2450
  34. 490
  35. 203
  36. 152
  37. 114
  38. 36
  39. 285
  40. 406

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