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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 563 · 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. 1.12 × 49 =
  2. 2.13 × 98 =
  3. 3.5 × 49 =
  4. 4.15 × 98 =
  5. 5.11 × 9 =
  6. 6.6 × 19 =
  7. 7.5 × 9 =
  8. 8.13 × 99 =
  9. 9.5 × 9 =
  10. 10.15 × 19 =
  11. 11.3 × 9 =
  12. 12.9 × 29 =
  13. 13.7 × 9 =
  14. 14.35 × 99 =
  15. 15.7 × 98 =
  16. 16.12 × 9 =
  17. 17.24 × 99 =
  18. 18.7 × 19 =
  19. 19.5 × 19 =
  20. 20.5 × 19 =
  21. 21.9 × 9 =
  22. 22.8 × 19 =
  23. 23.9 × 29 =
  24. 24.23 × 98 =
  25. 25.7 × 29 =
  26. 26.13 × 9 =
  27. 27.15 × 19 =
  28. 28.19 × 98 =
  29. 29.24 × 99 =
  30. 30.10 × 49 =
  31. 31.9 × 99 =
  32. 32.31 × 98 =
  33. 33.15 × 98 =
  34. 34.28 × 99 =
  35. 35.15 × 49 =
  36. 36.7 × 9 =
  37. 37.4 × 49 =
  38. 38.3 × 9 =
  39. 39.4 × 99 =
  40. 40.5 × 19 =

Answer key

  1. 588
  2. 1274
  3. 245
  4. 1470
  5. 99
  6. 114
  7. 45
  8. 1287
  9. 45
  10. 285
  11. 27
  12. 261
  13. 63
  14. 3465
  15. 686
  16. 108
  17. 2376
  18. 133
  19. 95
  20. 95
  21. 81
  22. 152
  23. 261
  24. 2254
  25. 203
  26. 117
  27. 285
  28. 1862
  29. 2376
  30. 490
  31. 891
  32. 3038
  33. 1470
  34. 2772
  35. 735
  36. 63
  37. 196
  38. 27
  39. 396
  40. 95

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