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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 372 · 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 × 19 =
  2. 2.35 × 98 =
  3. 3.10 × 9 =
  4. 4.14 × 49 =
  5. 5.3 × 99 =
  6. 6.9 × 29 =
  7. 7.15 × 9 =
  8. 8.6 × 19 =
  9. 9.10 × 99 =
  10. 10.4 × 49 =
  11. 11.22 × 98 =
  12. 12.9 × 98 =
  13. 13.13 × 99 =
  14. 14.9 × 29 =
  15. 15.10 × 9 =
  16. 16.5 × 29 =
  17. 17.5 × 98 =
  18. 18.40 × 98 =
  19. 19.15 × 49 =
  20. 20.37 × 98 =
  21. 21.29 × 98 =
  22. 22.5 × 49 =
  23. 23.26 × 98 =
  24. 24.5 × 9 =
  25. 25.9 × 49 =
  26. 26.13 × 19 =
  27. 27.30 × 99 =
  28. 28.6 × 9 =
  29. 29.15 × 29 =
  30. 30.6 × 99 =
  31. 31.15 × 9 =
  32. 32.34 × 99 =
  33. 33.12 × 98 =
  34. 34.31 × 99 =
  35. 35.27 × 98 =
  36. 36.5 × 19 =
  37. 37.37 × 98 =
  38. 38.5 × 9 =
  39. 39.11 × 19 =
  40. 40.3 × 9 =

Answer key

  1. 57
  2. 3430
  3. 90
  4. 686
  5. 297
  6. 261
  7. 135
  8. 114
  9. 990
  10. 196
  11. 2156
  12. 882
  13. 1287
  14. 261
  15. 90
  16. 145
  17. 490
  18. 3920
  19. 735
  20. 3626
  21. 2842
  22. 245
  23. 2548
  24. 45
  25. 441
  26. 247
  27. 2970
  28. 54
  29. 435
  30. 594
  31. 135
  32. 3366
  33. 1176
  34. 3069
  35. 2646
  36. 95
  37. 3626
  38. 45
  39. 209
  40. 27

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