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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 357 · 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. 2.7 × 9 =
  3. 3.10 × 29 =
  4. 4.15 × 29 =
  5. 5.15 × 19 =
  6. 6.15 × 19 =
  7. 7.34 × 99 =
  8. 8.5 × 19 =
  9. 9.9 × 19 =
  10. 10.4 × 29 =
  11. 11.36 × 99 =
  12. 12.17 × 99 =
  13. 13.29 × 98 =
  14. 14.8 × 19 =
  15. 15.5 × 49 =
  16. 16.8 × 29 =
  17. 17.35 × 98 =
  18. 18.28 × 98 =
  19. 19.14 × 29 =
  20. 20.12 × 19 =
  21. 21.10 × 49 =
  22. 22.10 × 99 =
  23. 23.11 × 99 =
  24. 24.8 × 9 =
  25. 25.26 × 99 =
  26. 26.12 × 19 =
  27. 27.13 × 9 =
  28. 28.10 × 29 =
  29. 29.4 × 29 =
  30. 30.10 × 49 =
  31. 31.28 × 98 =
  32. 32.3 × 9 =
  33. 33.8 × 98 =
  34. 34.10 × 9 =
  35. 35.15 × 9 =
  36. 36.3 × 9 =
  37. 37.34 × 99 =
  38. 38.13 × 49 =
  39. 39.8 × 19 =
  40. 40.9 × 9 =

Answer key

  1. 27
  2. 63
  3. 290
  4. 435
  5. 285
  6. 285
  7. 3366
  8. 95
  9. 171
  10. 116
  11. 3564
  12. 1683
  13. 2842
  14. 152
  15. 245
  16. 232
  17. 3430
  18. 2744
  19. 406
  20. 228
  21. 490
  22. 990
  23. 1089
  24. 72
  25. 2574
  26. 228
  27. 117
  28. 290
  29. 116
  30. 490
  31. 2744
  32. 27
  33. 784
  34. 90
  35. 135
  36. 27
  37. 3366
  38. 637
  39. 152
  40. 81

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