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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 340 · 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. 1.10 × 9 =
  2. 2.22 × 98 =
  3. 3.15 × 99 =
  4. 4.10 × 19 =
  5. 5.21 × 98 =
  6. 6.11 × 99 =
  7. 7.5 × 19 =
  8. 8.20 × 98 =
  9. 9.14 × 49 =
  10. 10.14 × 19 =
  11. 11.11 × 9 =
  12. 12.5 × 9 =
  13. 13.6 × 49 =
  14. 14.12 × 98 =
  15. 15.15 × 9 =
  16. 16.13 × 9 =
  17. 17.6 × 9 =
  18. 18.10 × 98 =
  19. 19.7 × 9 =
  20. 20.19 × 99 =
  21. 21.4 × 19 =
  22. 22.7 × 9 =
  23. 23.10 × 9 =
  24. 24.13 × 19 =
  25. 25.13 × 9 =
  26. 26.11 × 9 =
  27. 27.3 × 9 =
  28. 28.8 × 9 =
  29. 29.3 × 9 =
  30. 30.6 × 49 =
  31. 31.5 × 29 =
  32. 32.38 × 98 =
  33. 33.3 × 19 =
  34. 34.17 × 98 =
  35. 35.33 × 99 =
  36. 36.9 × 19 =
  37. 37.3 × 19 =
  38. 38.5 × 19 =
  39. 39.8 × 49 =
  40. 40.5 × 9 =

Answer key

  1. 90
  2. 2156
  3. 1485
  4. 190
  5. 2058
  6. 1089
  7. 95
  8. 1960
  9. 686
  10. 266
  11. 99
  12. 45
  13. 294
  14. 1176
  15. 135
  16. 117
  17. 54
  18. 980
  19. 63
  20. 1881
  21. 76
  22. 63
  23. 90
  24. 247
  25. 117
  26. 99
  27. 27
  28. 72
  29. 27
  30. 294
  31. 145
  32. 3724
  33. 57
  34. 1666
  35. 3267
  36. 171
  37. 57
  38. 95
  39. 392
  40. 45

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