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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 420 · 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. 1.13 × 19 =
  2. 2.6 × 29 =
  3. 3.4 × 19 =
  4. 4.14 × 9 =
  5. 5.3 × 29 =
  6. 6.13 × 9 =
  7. 7.4 × 9 =
  8. 8.21 × 98 =
  9. 9.27 × 98 =
  10. 10.5 × 19 =
  11. 11.15 × 9 =
  12. 12.14 × 49 =
  13. 13.4 × 29 =
  14. 14.5 × 19 =
  15. 15.5 × 9 =
  16. 16.8 × 19 =
  17. 17.11 × 19 =
  18. 18.5 × 49 =
  19. 19.10 × 99 =
  20. 20.30 × 99 =
  21. 21.11 × 19 =
  22. 22.37 × 99 =
  23. 23.27 × 98 =
  24. 24.5 × 19 =
  25. 25.11 × 99 =
  26. 26.11 × 9 =
  27. 27.23 × 98 =
  28. 28.6 × 49 =
  29. 29.12 × 49 =
  30. 30.10 × 29 =
  31. 31.9 × 9 =
  32. 32.10 × 19 =
  33. 33.38 × 98 =
  34. 34.11 × 29 =
  35. 35.37 × 98 =
  36. 36.13 × 49 =
  37. 37.10 × 49 =
  38. 38.15 × 9 =
  39. 39.12 × 49 =
  40. 40.5 × 49 =

Answer key

  1. 247
  2. 174
  3. 76
  4. 126
  5. 87
  6. 117
  7. 36
  8. 2058
  9. 2646
  10. 95
  11. 135
  12. 686
  13. 116
  14. 95
  15. 45
  16. 152
  17. 209
  18. 245
  19. 990
  20. 2970
  21. 209
  22. 3663
  23. 2646
  24. 95
  25. 1089
  26. 99
  27. 2254
  28. 294
  29. 588
  30. 290
  31. 81
  32. 190
  33. 3724
  34. 319
  35. 3626
  36. 637
  37. 490
  38. 135
  39. 588
  40. 245

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