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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 732 · 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 × 49 =
  2. 2.12 × 9 =
  3. 3.9 × 19 =
  4. 4.14 × 49 =
  5. 5.6 × 49 =
  6. 6.3 × 99 =
  7. 7.23 × 99 =
  8. 8.27 × 98 =
  9. 9.7 × 9 =
  10. 10.16 × 98 =
  11. 11.13 × 19 =
  12. 12.6 × 9 =
  13. 13.7 × 98 =
  14. 14.7 × 19 =
  15. 15.10 × 19 =
  16. 16.9 × 98 =
  17. 17.30 × 98 =
  18. 18.5 × 9 =
  19. 19.20 × 99 =
  20. 20.10 × 19 =
  21. 21.4 × 9 =
  22. 22.3 × 98 =
  23. 23.12 × 9 =
  24. 24.15 × 29 =
  25. 25.20 × 99 =
  26. 26.7 × 99 =
  27. 27.10 × 49 =
  28. 28.14 × 9 =
  29. 29.9 × 49 =
  30. 30.6 × 98 =
  31. 31.11 × 29 =
  32. 32.15 × 9 =
  33. 33.8 × 98 =
  34. 34.11 × 29 =
  35. 35.32 × 99 =
  36. 36.4 × 9 =
  37. 37.6 × 49 =
  38. 38.9 × 19 =
  39. 39.4 × 98 =
  40. 40.6 × 19 =

Answer key

  1. 490
  2. 108
  3. 171
  4. 686
  5. 294
  6. 297
  7. 2277
  8. 2646
  9. 63
  10. 1568
  11. 247
  12. 54
  13. 686
  14. 133
  15. 190
  16. 882
  17. 2940
  18. 45
  19. 1980
  20. 190
  21. 36
  22. 294
  23. 108
  24. 435
  25. 1980
  26. 693
  27. 490
  28. 126
  29. 441
  30. 588
  31. 319
  32. 135
  33. 784
  34. 319
  35. 3168
  36. 36
  37. 294
  38. 171
  39. 392
  40. 114

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