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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 701 · 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 × 29 =
  2. 2.15 × 49 =
  3. 3.5 × 98 =
  4. 4.8 × 19 =
  5. 5.6 × 98 =
  6. 6.14 × 19 =
  7. 7.30 × 98 =
  8. 8.13 × 19 =
  9. 9.15 × 98 =
  10. 10.5 × 98 =
  11. 11.3 × 19 =
  12. 12.14 × 19 =
  13. 13.14 × 99 =
  14. 14.3 × 29 =
  15. 15.17 × 98 =
  16. 16.4 × 9 =
  17. 17.32 × 98 =
  18. 18.14 × 98 =
  19. 19.15 × 49 =
  20. 20.5 × 29 =
  21. 21.15 × 9 =
  22. 22.5 × 9 =
  23. 23.30 × 98 =
  24. 24.34 × 98 =
  25. 25.6 × 9 =
  26. 26.6 × 19 =
  27. 27.3 × 98 =
  28. 28.7 × 99 =
  29. 29.14 × 9 =
  30. 30.3 × 49 =
  31. 31.12 × 49 =
  32. 32.4 × 9 =
  33. 33.9 × 19 =
  34. 34.14 × 29 =
  35. 35.12 × 9 =
  36. 36.5 × 9 =
  37. 37.13 × 19 =
  38. 38.26 × 98 =
  39. 39.10 × 9 =
  40. 40.10 × 9 =

Answer key

  1. 145
  2. 735
  3. 490
  4. 152
  5. 588
  6. 266
  7. 2940
  8. 247
  9. 1470
  10. 490
  11. 57
  12. 266
  13. 1386
  14. 87
  15. 1666
  16. 36
  17. 3136
  18. 1372
  19. 735
  20. 145
  21. 135
  22. 45
  23. 2940
  24. 3332
  25. 54
  26. 114
  27. 294
  28. 693
  29. 126
  30. 147
  31. 588
  32. 36
  33. 171
  34. 406
  35. 108
  36. 45
  37. 247
  38. 2548
  39. 90
  40. 90

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