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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 115 · 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. 1.5 × 29 =
  2. 2.7 × 9 =
  3. 3.11 × 9 =
  4. 4.27 × 98 =
  5. 5.3 × 29 =
  6. 6.3 × 19 =
  7. 7.3 × 19 =
  8. 8.4 × 9 =
  9. 9.34 × 99 =
  10. 10.10 × 9 =
  11. 11.14 × 9 =
  12. 12.17 × 98 =
  13. 13.13 × 29 =
  14. 14.13 × 29 =
  15. 15.28 × 99 =
  16. 16.3 × 29 =
  17. 17.4 × 49 =
  18. 18.10 × 19 =
  19. 19.3 × 29 =
  20. 20.29 × 98 =
  21. 21.14 × 29 =
  22. 22.20 × 98 =
  23. 23.13 × 49 =
  24. 24.7 × 19 =
  25. 25.3 × 98 =
  26. 26.36 × 99 =
  27. 27.25 × 98 =
  28. 28.37 × 98 =
  29. 29.3 × 98 =
  30. 30.8 × 29 =
  31. 31.11 × 49 =
  32. 32.12 × 19 =
  33. 33.12 × 98 =
  34. 34.7 × 9 =
  35. 35.3 × 19 =
  36. 36.11 × 49 =
  37. 37.13 × 99 =
  38. 38.4 × 29 =
  39. 39.11 × 19 =
  40. 40.12 × 9 =

Answer key

  1. 145
  2. 63
  3. 99
  4. 2646
  5. 87
  6. 57
  7. 57
  8. 36
  9. 3366
  10. 90
  11. 126
  12. 1666
  13. 377
  14. 377
  15. 2772
  16. 87
  17. 196
  18. 190
  19. 87
  20. 2842
  21. 406
  22. 1960
  23. 637
  24. 133
  25. 294
  26. 3564
  27. 2450
  28. 3626
  29. 294
  30. 232
  31. 539
  32. 228
  33. 1176
  34. 63
  35. 57
  36. 539
  37. 1287
  38. 116
  39. 209
  40. 108

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