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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 286 · 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. 1.12 × 19 =
  2. 2.11 × 9 =
  3. 3.10 × 9 =
  4. 4.15 × 49 =
  5. 5.34 × 98 =
  6. 6.12 × 49 =
  7. 7.13 × 19 =
  8. 8.8 × 19 =
  9. 9.13 × 19 =
  10. 10.15 × 29 =
  11. 11.13 × 98 =
  12. 12.3 × 9 =
  13. 13.34 × 99 =
  14. 14.3 × 19 =
  15. 15.14 × 9 =
  16. 16.10 × 9 =
  17. 17.39 × 98 =
  18. 18.7 × 29 =
  19. 19.11 × 49 =
  20. 20.5 × 9 =
  21. 21.33 × 98 =
  22. 22.4 × 29 =
  23. 23.8 × 19 =
  24. 24.11 × 99 =
  25. 25.5 × 9 =
  26. 26.26 × 98 =
  27. 27.4 × 29 =
  28. 28.3 × 19 =
  29. 29.5 × 9 =
  30. 30.9 × 29 =
  31. 31.32 × 98 =
  32. 32.23 × 98 =
  33. 33.18 × 98 =
  34. 34.9 × 49 =
  35. 35.4 × 49 =
  36. 36.5 × 19 =
  37. 37.5 × 19 =
  38. 38.21 × 98 =
  39. 39.6 × 19 =
  40. 40.12 × 19 =

Answer key

  1. 228
  2. 99
  3. 90
  4. 735
  5. 3332
  6. 588
  7. 247
  8. 152
  9. 247
  10. 435
  11. 1274
  12. 27
  13. 3366
  14. 57
  15. 126
  16. 90
  17. 3822
  18. 203
  19. 539
  20. 45
  21. 3234
  22. 116
  23. 152
  24. 1089
  25. 45
  26. 2548
  27. 116
  28. 57
  29. 45
  30. 261
  31. 3136
  32. 2254
  33. 1764
  34. 441
  35. 196
  36. 95
  37. 95
  38. 2058
  39. 114
  40. 228

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