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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 650 · 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. 1.6 × 9 =
  2. 2.12 × 19 =
  3. 3.35 × 98 =
  4. 4.20 × 98 =
  5. 5.12 × 29 =
  6. 6.13 × 29 =
  7. 7.29 × 98 =
  8. 8.11 × 9 =
  9. 9.36 × 98 =
  10. 10.14 × 49 =
  11. 11.12 × 19 =
  12. 12.11 × 99 =
  13. 13.7 × 98 =
  14. 14.28 × 98 =
  15. 15.5 × 19 =
  16. 16.4 × 19 =
  17. 17.13 × 9 =
  18. 18.9 × 9 =
  19. 19.33 × 99 =
  20. 20.9 × 49 =
  21. 21.30 × 98 =
  22. 22.14 × 29 =
  23. 23.10 × 98 =
  24. 24.28 × 99 =
  25. 25.10 × 49 =
  26. 26.11 × 29 =
  27. 27.16 × 99 =
  28. 28.10 × 9 =
  29. 29.13 × 19 =
  30. 30.10 × 49 =
  31. 31.3 × 19 =
  32. 32.3 × 29 =
  33. 33.24 × 98 =
  34. 34.31 × 98 =
  35. 35.8 × 9 =
  36. 36.12 × 29 =
  37. 37.3 × 49 =
  38. 38.6 × 9 =
  39. 39.4 × 19 =
  40. 40.10 × 9 =

Answer key

  1. 54
  2. 228
  3. 3430
  4. 1960
  5. 348
  6. 377
  7. 2842
  8. 99
  9. 3528
  10. 686
  11. 228
  12. 1089
  13. 686
  14. 2744
  15. 95
  16. 76
  17. 117
  18. 81
  19. 3267
  20. 441
  21. 2940
  22. 406
  23. 980
  24. 2772
  25. 490
  26. 319
  27. 1584
  28. 90
  29. 247
  30. 490
  31. 57
  32. 87
  33. 2352
  34. 3038
  35. 72
  36. 348
  37. 147
  38. 54
  39. 76
  40. 90

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