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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 399 · 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 × 29 =
  2. 2.11 × 49 =
  3. 3.21 × 98 =
  4. 4.9 × 29 =
  5. 5.8 × 99 =
  6. 6.32 × 99 =
  7. 7.8 × 29 =
  8. 8.6 × 19 =
  9. 9.3 × 49 =
  10. 10.12 × 19 =
  11. 11.6 × 29 =
  12. 12.4 × 19 =
  13. 13.6 × 9 =
  14. 14.14 × 9 =
  15. 15.9 × 49 =
  16. 16.7 × 19 =
  17. 17.15 × 19 =
  18. 18.31 × 98 =
  19. 19.6 × 19 =
  20. 20.31 × 98 =
  21. 21.6 × 19 =
  22. 22.3 × 29 =
  23. 23.14 × 29 =
  24. 24.14 × 49 =
  25. 25.7 × 98 =
  26. 26.29 × 98 =
  27. 27.8 × 49 =
  28. 28.15 × 9 =
  29. 29.3 × 9 =
  30. 30.11 × 19 =
  31. 31.15 × 49 =
  32. 32.12 × 49 =
  33. 33.19 × 99 =
  34. 34.12 × 29 =
  35. 35.15 × 9 =
  36. 36.14 × 19 =
  37. 37.6 × 29 =
  38. 38.5 × 49 =
  39. 39.31 × 99 =
  40. 40.11 × 19 =

Answer key

  1. 261
  2. 539
  3. 2058
  4. 261
  5. 792
  6. 3168
  7. 232
  8. 114
  9. 147
  10. 228
  11. 174
  12. 76
  13. 54
  14. 126
  15. 441
  16. 133
  17. 285
  18. 3038
  19. 114
  20. 3038
  21. 114
  22. 87
  23. 406
  24. 686
  25. 686
  26. 2842
  27. 392
  28. 135
  29. 27
  30. 209
  31. 735
  32. 588
  33. 1881
  34. 348
  35. 135
  36. 266
  37. 174
  38. 245
  39. 3069
  40. 209

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