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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 235 · 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 × 49 =
  2. 2.23 × 99 =
  3. 3.5 × 99 =
  4. 4.14 × 9 =
  5. 5.26 × 99 =
  6. 6.4 × 19 =
  7. 7.12 × 29 =
  8. 8.6 × 9 =
  9. 9.16 × 98 =
  10. 10.12 × 9 =
  11. 11.13 × 9 =
  12. 12.4 × 98 =
  13. 13.10 × 9 =
  14. 14.13 × 29 =
  15. 15.28 × 98 =
  16. 16.5 × 49 =
  17. 17.10 × 29 =
  18. 18.13 × 9 =
  19. 19.5 × 29 =
  20. 20.6 × 9 =
  21. 21.19 × 98 =
  22. 22.12 × 19 =
  23. 23.10 × 9 =
  24. 24.7 × 9 =
  25. 25.14 × 9 =
  26. 26.14 × 9 =
  27. 27.3 × 29 =
  28. 28.12 × 19 =
  29. 29.10 × 19 =
  30. 30.14 × 19 =
  31. 31.11 × 19 =
  32. 32.12 × 99 =
  33. 33.13 × 99 =
  34. 34.15 × 49 =
  35. 35.11 × 9 =
  36. 36.8 × 9 =
  37. 37.3 × 19 =
  38. 38.8 × 9 =
  39. 39.20 × 98 =
  40. 40.21 × 98 =

Answer key

  1. 735
  2. 2277
  3. 495
  4. 126
  5. 2574
  6. 76
  7. 348
  8. 54
  9. 1568
  10. 108
  11. 117
  12. 392
  13. 90
  14. 377
  15. 2744
  16. 245
  17. 290
  18. 117
  19. 145
  20. 54
  21. 1862
  22. 228
  23. 90
  24. 63
  25. 126
  26. 126
  27. 87
  28. 228
  29. 190
  30. 266
  31. 209
  32. 1188
  33. 1287
  34. 735
  35. 99
  36. 72
  37. 57
  38. 72
  39. 1960
  40. 2058

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