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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 586 · 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. 1.5 × 49 =
  2. 2.10 × 9 =
  3. 3.14 × 19 =
  4. 4.8 × 19 =
  5. 5.6 × 99 =
  6. 6.4 × 99 =
  7. 7.5 × 9 =
  8. 8.7 × 9 =
  9. 9.11 × 9 =
  10. 10.10 × 19 =
  11. 11.3 × 29 =
  12. 12.7 × 9 =
  13. 13.3 × 19 =
  14. 14.4 × 9 =
  15. 15.32 × 99 =
  16. 16.8 × 98 =
  17. 17.9 × 49 =
  18. 18.10 × 9 =
  19. 19.8 × 29 =
  20. 20.5 × 19 =
  21. 21.5 × 9 =
  22. 22.15 × 29 =
  23. 23.15 × 19 =
  24. 24.4 × 29 =
  25. 25.9 × 49 =
  26. 26.33 × 98 =
  27. 27.14 × 99 =
  28. 28.8 × 9 =
  29. 29.6 × 29 =
  30. 30.4 × 49 =
  31. 31.14 × 29 =
  32. 32.8 × 9 =
  33. 33.7 × 9 =
  34. 34.15 × 9 =
  35. 35.4 × 19 =
  36. 36.12 × 29 =
  37. 37.10 × 19 =
  38. 38.37 × 99 =
  39. 39.5 × 29 =
  40. 40.9 × 49 =

Answer key

  1. 245
  2. 90
  3. 266
  4. 152
  5. 594
  6. 396
  7. 45
  8. 63
  9. 99
  10. 190
  11. 87
  12. 63
  13. 57
  14. 36
  15. 3168
  16. 784
  17. 441
  18. 90
  19. 232
  20. 95
  21. 45
  22. 435
  23. 285
  24. 116
  25. 441
  26. 3234
  27. 1386
  28. 72
  29. 174
  30. 196
  31. 406
  32. 72
  33. 63
  34. 135
  35. 76
  36. 348
  37. 190
  38. 3663
  39. 145
  40. 441

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