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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 100 · 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. 1.9 × 49 =
  2. 2.3 × 49 =
  3. 3.15 × 99 =
  4. 4.12 × 19 =
  5. 5.3 × 19 =
  6. 6.7 × 19 =
  7. 7.12 × 49 =
  8. 8.6 × 19 =
  9. 9.12 × 9 =
  10. 10.25 × 99 =
  11. 11.6 × 29 =
  12. 12.3 × 99 =
  13. 13.7 × 19 =
  14. 14.3 × 49 =
  15. 15.5 × 9 =
  16. 16.9 × 9 =
  17. 17.5 × 19 =
  18. 18.14 × 29 =
  19. 19.13 × 19 =
  20. 20.11 × 9 =
  21. 21.4 × 99 =
  22. 22.15 × 19 =
  23. 23.34 × 98 =
  24. 24.11 × 19 =
  25. 25.15 × 49 =
  26. 26.12 × 9 =
  27. 27.6 × 29 =
  28. 28.40 × 98 =
  29. 29.10 × 9 =
  30. 30.5 × 49 =
  31. 31.14 × 19 =
  32. 32.8 × 29 =
  33. 33.13 × 29 =
  34. 34.11 × 9 =
  35. 35.4 × 19 =
  36. 36.38 × 99 =
  37. 37.11 × 9 =
  38. 38.9 × 49 =
  39. 39.9 × 19 =
  40. 40.3 × 19 =

Answer key

  1. 441
  2. 147
  3. 1485
  4. 228
  5. 57
  6. 133
  7. 588
  8. 114
  9. 108
  10. 2475
  11. 174
  12. 297
  13. 133
  14. 147
  15. 45
  16. 81
  17. 95
  18. 406
  19. 247
  20. 99
  21. 396
  22. 285
  23. 3332
  24. 209
  25. 735
  26. 108
  27. 174
  28. 3920
  29. 90
  30. 245
  31. 266
  32. 232
  33. 377
  34. 99
  35. 76
  36. 3762
  37. 99
  38. 441
  39. 171
  40. 57

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