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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 812 · 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. 1.9 × 99 =
  2. 2.4 × 9 =
  3. 3.14 × 9 =
  4. 4.10 × 49 =
  5. 5.4 × 9 =
  6. 6.5 × 29 =
  7. 7.9 × 19 =
  8. 8.6 × 9 =
  9. 9.36 × 99 =
  10. 10.5 × 49 =
  11. 11.14 × 29 =
  12. 12.12 × 49 =
  13. 13.11 × 99 =
  14. 14.11 × 9 =
  15. 15.15 × 49 =
  16. 16.8 × 99 =
  17. 17.6 × 9 =
  18. 18.11 × 99 =
  19. 19.5 × 9 =
  20. 20.7 × 9 =
  21. 21.6 × 19 =
  22. 22.23 × 98 =
  23. 23.5 × 19 =
  24. 24.11 × 99 =
  25. 25.15 × 9 =
  26. 26.3 × 29 =
  27. 27.5 × 19 =
  28. 28.9 × 9 =
  29. 29.11 × 9 =
  30. 30.15 × 29 =
  31. 31.4 × 19 =
  32. 32.12 × 19 =
  33. 33.9 × 98 =
  34. 34.3 × 99 =
  35. 35.4 × 9 =
  36. 36.9 × 49 =
  37. 37.25 × 98 =
  38. 38.15 × 9 =
  39. 39.9 × 9 =
  40. 40.6 × 29 =

Answer key

  1. 891
  2. 36
  3. 126
  4. 490
  5. 36
  6. 145
  7. 171
  8. 54
  9. 3564
  10. 245
  11. 406
  12. 588
  13. 1089
  14. 99
  15. 735
  16. 792
  17. 54
  18. 1089
  19. 45
  20. 63
  21. 114
  22. 2254
  23. 95
  24. 1089
  25. 135
  26. 87
  27. 95
  28. 81
  29. 99
  30. 435
  31. 76
  32. 228
  33. 882
  34. 297
  35. 36
  36. 441
  37. 2450
  38. 135
  39. 81
  40. 174

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