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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 314 · 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. 1.28 × 99 =
  2. 2.31 × 99 =
  3. 3.5 × 49 =
  4. 4.4 × 29 =
  5. 5.3 × 19 =
  6. 6.8 × 98 =
  7. 7.14 × 49 =
  8. 8.22 × 98 =
  9. 9.3 × 98 =
  10. 10.7 × 29 =
  11. 11.37 × 98 =
  12. 12.11 × 9 =
  13. 13.21 × 98 =
  14. 14.11 × 9 =
  15. 15.6 × 29 =
  16. 16.40 × 99 =
  17. 17.15 × 29 =
  18. 18.3 × 98 =
  19. 19.9 × 49 =
  20. 20.10 × 98 =
  21. 21.14 × 99 =
  22. 22.36 × 98 =
  23. 23.10 × 9 =
  24. 24.6 × 29 =
  25. 25.7 × 9 =
  26. 26.7 × 99 =
  27. 27.7 × 98 =
  28. 28.6 × 19 =
  29. 29.4 × 29 =
  30. 30.12 × 9 =
  31. 31.5 × 29 =
  32. 32.20 × 98 =
  33. 33.6 × 9 =
  34. 34.12 × 19 =
  35. 35.17 × 98 =
  36. 36.4 × 49 =
  37. 37.5 × 9 =
  38. 38.17 × 99 =
  39. 39.4 × 49 =
  40. 40.12 × 19 =

Answer key

  1. 2772
  2. 3069
  3. 245
  4. 116
  5. 57
  6. 784
  7. 686
  8. 2156
  9. 294
  10. 203
  11. 3626
  12. 99
  13. 2058
  14. 99
  15. 174
  16. 3960
  17. 435
  18. 294
  19. 441
  20. 980
  21. 1386
  22. 3528
  23. 90
  24. 174
  25. 63
  26. 693
  27. 686
  28. 114
  29. 116
  30. 108
  31. 145
  32. 1960
  33. 54
  34. 228
  35. 1666
  36. 196
  37. 45
  38. 1683
  39. 196
  40. 228

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