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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 709 · 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. 1.10 × 49 =
  2. 2.5 × 49 =
  3. 3.9 × 19 =
  4. 4.15 × 9 =
  5. 5.9 × 19 =
  6. 6.24 × 98 =
  7. 7.10 × 98 =
  8. 8.8 × 9 =
  9. 9.15 × 29 =
  10. 10.38 × 98 =
  11. 11.4 × 29 =
  12. 12.5 × 19 =
  13. 13.14 × 19 =
  14. 14.7 × 9 =
  15. 15.16 × 98 =
  16. 16.10 × 19 =
  17. 17.5 × 9 =
  18. 18.7 × 49 =
  19. 19.10 × 9 =
  20. 20.13 × 29 =
  21. 21.12 × 19 =
  22. 22.18 × 99 =
  23. 23.4 × 49 =
  24. 24.12 × 19 =
  25. 25.6 × 49 =
  26. 26.6 × 49 =
  27. 27.8 × 98 =
  28. 28.4 × 49 =
  29. 29.5 × 29 =
  30. 30.7 × 9 =
  31. 31.5 × 19 =
  32. 32.38 × 98 =
  33. 33.5 × 9 =
  34. 34.13 × 29 =
  35. 35.11 × 49 =
  36. 36.15 × 9 =
  37. 37.14 × 19 =
  38. 38.13 × 29 =
  39. 39.3 × 49 =
  40. 40.28 × 98 =

Answer key

  1. 490
  2. 245
  3. 171
  4. 135
  5. 171
  6. 2352
  7. 980
  8. 72
  9. 435
  10. 3724
  11. 116
  12. 95
  13. 266
  14. 63
  15. 1568
  16. 190
  17. 45
  18. 343
  19. 90
  20. 377
  21. 228
  22. 1782
  23. 196
  24. 228
  25. 294
  26. 294
  27. 784
  28. 196
  29. 145
  30. 63
  31. 95
  32. 3724
  33. 45
  34. 377
  35. 539
  36. 135
  37. 266
  38. 377
  39. 147
  40. 2744

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