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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 629 · 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. 1.23 × 99 =
  2. 2.8 × 29 =
  3. 3.5 × 19 =
  4. 4.4 × 9 =
  5. 5.36 × 98 =
  6. 6.14 × 19 =
  7. 7.12 × 49 =
  8. 8.6 × 29 =
  9. 9.16 × 98 =
  10. 10.21 × 99 =
  11. 11.3 × 29 =
  12. 12.4 × 49 =
  13. 13.9 × 9 =
  14. 14.7 × 19 =
  15. 15.4 × 9 =
  16. 16.11 × 19 =
  17. 17.5 × 29 =
  18. 18.6 × 9 =
  19. 19.3 × 49 =
  20. 20.9 × 9 =
  21. 21.6 × 29 =
  22. 22.10 × 49 =
  23. 23.27 × 98 =
  24. 24.8 × 98 =
  25. 25.8 × 19 =
  26. 26.8 × 19 =
  27. 27.11 × 49 =
  28. 28.9 × 19 =
  29. 29.6 × 19 =
  30. 30.3 × 9 =
  31. 31.36 × 99 =
  32. 32.11 × 19 =
  33. 33.5 × 29 =
  34. 34.11 × 99 =
  35. 35.7 × 9 =
  36. 36.11 × 19 =
  37. 37.7 × 9 =
  38. 38.40 × 99 =
  39. 39.14 × 9 =
  40. 40.5 × 9 =

Answer key

  1. 2277
  2. 232
  3. 95
  4. 36
  5. 3528
  6. 266
  7. 588
  8. 174
  9. 1568
  10. 2079
  11. 87
  12. 196
  13. 81
  14. 133
  15. 36
  16. 209
  17. 145
  18. 54
  19. 147
  20. 81
  21. 174
  22. 490
  23. 2646
  24. 784
  25. 152
  26. 152
  27. 539
  28. 171
  29. 114
  30. 27
  31. 3564
  32. 209
  33. 145
  34. 1089
  35. 63
  36. 209
  37. 63
  38. 3960
  39. 126
  40. 45

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