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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 811 · 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. 1.25 × 98 =
  2. 2.13 × 19 =
  3. 3.10 × 49 =
  4. 4.36 × 99 =
  5. 5.8 × 49 =
  6. 6.31 × 98 =
  7. 7.15 × 19 =
  8. 8.28 × 99 =
  9. 9.8 × 29 =
  10. 10.14 × 49 =
  11. 11.6 × 19 =
  12. 12.7 × 19 =
  13. 13.6 × 9 =
  14. 14.5 × 19 =
  15. 15.9 × 19 =
  16. 16.13 × 9 =
  17. 17.11 × 29 =
  18. 18.4 × 29 =
  19. 19.3 × 19 =
  20. 20.7 × 98 =
  21. 21.4 × 29 =
  22. 22.23 × 98 =
  23. 23.11 × 19 =
  24. 24.5 × 49 =
  25. 25.14 × 9 =
  26. 26.18 × 98 =
  27. 27.34 × 99 =
  28. 28.8 × 49 =
  29. 29.4 × 49 =
  30. 30.30 × 99 =
  31. 31.6 × 99 =
  32. 32.4 × 9 =
  33. 33.5 × 29 =
  34. 34.5 × 98 =
  35. 35.9 × 29 =
  36. 36.36 × 99 =
  37. 37.10 × 98 =
  38. 38.9 × 19 =
  39. 39.35 × 99 =
  40. 40.8 × 19 =

Answer key

  1. 2450
  2. 247
  3. 490
  4. 3564
  5. 392
  6. 3038
  7. 285
  8. 2772
  9. 232
  10. 686
  11. 114
  12. 133
  13. 54
  14. 95
  15. 171
  16. 117
  17. 319
  18. 116
  19. 57
  20. 686
  21. 116
  22. 2254
  23. 209
  24. 245
  25. 126
  26. 1764
  27. 3366
  28. 392
  29. 196
  30. 2970
  31. 594
  32. 36
  33. 145
  34. 490
  35. 261
  36. 3564
  37. 980
  38. 171
  39. 3465
  40. 152

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