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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 42 · 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. 1.15 × 19 =
  2. 2.10 × 9 =
  3. 3.5 × 9 =
  4. 4.7 × 9 =
  5. 5.6 × 19 =
  6. 6.7 × 19 =
  7. 7.22 × 99 =
  8. 8.14 × 9 =
  9. 9.20 × 98 =
  10. 10.11 × 49 =
  11. 11.15 × 49 =
  12. 12.10 × 29 =
  13. 13.36 × 99 =
  14. 14.3 × 49 =
  15. 15.3 × 29 =
  16. 16.22 × 98 =
  17. 17.13 × 19 =
  18. 18.27 × 99 =
  19. 19.11 × 9 =
  20. 20.3 × 49 =
  21. 21.5 × 9 =
  22. 22.4 × 29 =
  23. 23.14 × 99 =
  24. 24.7 × 29 =
  25. 25.3 × 49 =
  26. 26.9 × 19 =
  27. 27.6 × 29 =
  28. 28.5 × 29 =
  29. 29.15 × 9 =
  30. 30.8 × 98 =
  31. 31.14 × 99 =
  32. 32.5 × 9 =
  33. 33.9 × 29 =
  34. 34.10 × 19 =
  35. 35.15 × 29 =
  36. 36.7 × 49 =
  37. 37.28 × 98 =
  38. 38.9 × 9 =
  39. 39.8 × 19 =
  40. 40.11 × 49 =

Answer key

  1. 285
  2. 90
  3. 45
  4. 63
  5. 114
  6. 133
  7. 2178
  8. 126
  9. 1960
  10. 539
  11. 735
  12. 290
  13. 3564
  14. 147
  15. 87
  16. 2156
  17. 247
  18. 2673
  19. 99
  20. 147
  21. 45
  22. 116
  23. 1386
  24. 203
  25. 147
  26. 171
  27. 174
  28. 145
  29. 135
  30. 784
  31. 1386
  32. 45
  33. 261
  34. 190
  35. 435
  36. 343
  37. 2744
  38. 81
  39. 152
  40. 539

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