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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 374 · 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. 1.3 × 19 =
  2. 2.3 × 9 =
  3. 3.7 × 49 =
  4. 4.7 × 98 =
  5. 5.10 × 49 =
  6. 6.3 × 49 =
  7. 7.4 × 99 =
  8. 8.9 × 29 =
  9. 9.6 × 9 =
  10. 10.36 × 99 =
  11. 11.5 × 98 =
  12. 12.9 × 19 =
  13. 13.5 × 19 =
  14. 14.4 × 29 =
  15. 15.14 × 19 =
  16. 16.31 × 99 =
  17. 17.4 × 29 =
  18. 18.3 × 9 =
  19. 19.36 × 98 =
  20. 20.12 × 19 =
  21. 21.26 × 98 =
  22. 22.8 × 19 =
  23. 23.5 × 29 =
  24. 24.5 × 29 =
  25. 25.36 × 99 =
  26. 26.33 × 99 =
  27. 27.3 × 19 =
  28. 28.3 × 99 =
  29. 29.8 × 19 =
  30. 30.13 × 9 =
  31. 31.4 × 19 =
  32. 32.26 × 98 =
  33. 33.10 × 19 =
  34. 34.3 × 19 =
  35. 35.9 × 29 =
  36. 36.10 × 49 =
  37. 37.15 × 19 =
  38. 38.7 × 19 =
  39. 39.36 × 99 =
  40. 40.6 × 9 =

Answer key

  1. 57
  2. 27
  3. 343
  4. 686
  5. 490
  6. 147
  7. 396
  8. 261
  9. 54
  10. 3564
  11. 490
  12. 171
  13. 95
  14. 116
  15. 266
  16. 3069
  17. 116
  18. 27
  19. 3528
  20. 228
  21. 2548
  22. 152
  23. 145
  24. 145
  25. 3564
  26. 3267
  27. 57
  28. 297
  29. 152
  30. 117
  31. 76
  32. 2548
  33. 190
  34. 57
  35. 261
  36. 490
  37. 285
  38. 133
  39. 3564
  40. 54

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