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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 310 · 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 × 9 =
  2. 2.11 × 9 =
  3. 3.4 × 9 =
  4. 4.6 × 29 =
  5. 5.15 × 19 =
  6. 6.4 × 49 =
  7. 7.30 × 98 =
  8. 8.7 × 29 =
  9. 9.13 × 29 =
  10. 10.4 × 9 =
  11. 11.7 × 29 =
  12. 12.31 × 99 =
  13. 13.40 × 98 =
  14. 14.6 × 9 =
  15. 15.9 × 49 =
  16. 16.7 × 9 =
  17. 17.31 × 99 =
  18. 18.3 × 9 =
  19. 19.10 × 9 =
  20. 20.4 × 19 =
  21. 21.5 × 9 =
  22. 22.7 × 9 =
  23. 23.5 × 29 =
  24. 24.7 × 9 =
  25. 25.31 × 98 =
  26. 26.13 × 9 =
  27. 27.12 × 49 =
  28. 28.5 × 9 =
  29. 29.14 × 9 =
  30. 30.10 × 9 =
  31. 31.40 × 98 =
  32. 32.14 × 19 =
  33. 33.4 × 9 =
  34. 34.12 × 49 =
  35. 35.4 × 98 =
  36. 36.13 × 99 =
  37. 37.17 × 98 =
  38. 38.11 × 99 =
  39. 39.4 × 98 =
  40. 40.9 × 19 =

Answer key

  1. 27
  2. 99
  3. 36
  4. 174
  5. 285
  6. 196
  7. 2940
  8. 203
  9. 377
  10. 36
  11. 203
  12. 3069
  13. 3920
  14. 54
  15. 441
  16. 63
  17. 3069
  18. 27
  19. 90
  20. 76
  21. 45
  22. 63
  23. 145
  24. 63
  25. 3038
  26. 117
  27. 588
  28. 45
  29. 126
  30. 90
  31. 3920
  32. 266
  33. 36
  34. 588
  35. 392
  36. 1287
  37. 1666
  38. 1089
  39. 392
  40. 171

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