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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 515 · 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. 1.4 × 9 =
  2. 2.25 × 99 =
  3. 3.6 × 9 =
  4. 4.8 × 19 =
  5. 5.4 × 29 =
  6. 6.27 × 98 =
  7. 7.5 × 9 =
  8. 8.11 × 29 =
  9. 9.15 × 19 =
  10. 10.15 × 49 =
  11. 11.4 × 29 =
  12. 12.8 × 9 =
  13. 13.8 × 9 =
  14. 14.13 × 98 =
  15. 15.4 × 19 =
  16. 16.10 × 29 =
  17. 17.7 × 49 =
  18. 18.11 × 19 =
  19. 19.4 × 49 =
  20. 20.15 × 19 =
  21. 21.9 × 49 =
  22. 22.5 × 9 =
  23. 23.17 × 98 =
  24. 24.30 × 98 =
  25. 25.9 × 49 =
  26. 26.23 × 99 =
  27. 27.8 × 98 =
  28. 28.39 × 98 =
  29. 29.21 × 98 =
  30. 30.3 × 49 =
  31. 31.9 × 29 =
  32. 32.6 × 49 =
  33. 33.8 × 99 =
  34. 34.34 × 98 =
  35. 35.3 × 29 =
  36. 36.12 × 99 =
  37. 37.6 × 19 =
  38. 38.15 × 9 =
  39. 39.10 × 19 =
  40. 40.3 × 29 =

Answer key

  1. 36
  2. 2475
  3. 54
  4. 152
  5. 116
  6. 2646
  7. 45
  8. 319
  9. 285
  10. 735
  11. 116
  12. 72
  13. 72
  14. 1274
  15. 76
  16. 290
  17. 343
  18. 209
  19. 196
  20. 285
  21. 441
  22. 45
  23. 1666
  24. 2940
  25. 441
  26. 2277
  27. 784
  28. 3822
  29. 2058
  30. 147
  31. 261
  32. 294
  33. 792
  34. 3332
  35. 87
  36. 1188
  37. 114
  38. 135
  39. 190
  40. 87

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