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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 78 · 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. 1.26 × 98 =
  2. 2.5 × 9 =
  3. 3.8 × 9 =
  4. 4.35 × 98 =
  5. 5.15 × 98 =
  6. 6.11 × 19 =
  7. 7.11 × 9 =
  8. 8.7 × 9 =
  9. 9.5 × 9 =
  10. 10.5 × 19 =
  11. 11.20 × 98 =
  12. 12.39 × 98 =
  13. 13.7 × 99 =
  14. 14.3 × 49 =
  15. 15.7 × 9 =
  16. 16.11 × 19 =
  17. 17.36 × 98 =
  18. 18.6 × 29 =
  19. 19.9 × 9 =
  20. 20.3 × 9 =
  21. 21.10 × 19 =
  22. 22.14 × 19 =
  23. 23.28 × 99 =
  24. 24.4 × 49 =
  25. 25.11 × 9 =
  26. 26.11 × 9 =
  27. 27.11 × 29 =
  28. 28.10 × 19 =
  29. 29.7 × 9 =
  30. 30.19 × 98 =
  31. 31.11 × 19 =
  32. 32.15 × 49 =
  33. 33.33 × 98 =
  34. 34.15 × 49 =
  35. 35.14 × 49 =
  36. 36.5 × 9 =
  37. 37.11 × 9 =
  38. 38.3 × 98 =
  39. 39.15 × 29 =
  40. 40.9 × 9 =

Answer key

  1. 2548
  2. 45
  3. 72
  4. 3430
  5. 1470
  6. 209
  7. 99
  8. 63
  9. 45
  10. 95
  11. 1960
  12. 3822
  13. 693
  14. 147
  15. 63
  16. 209
  17. 3528
  18. 174
  19. 81
  20. 27
  21. 190
  22. 266
  23. 2772
  24. 196
  25. 99
  26. 99
  27. 319
  28. 190
  29. 63
  30. 1862
  31. 209
  32. 735
  33. 3234
  34. 735
  35. 686
  36. 45
  37. 99
  38. 294
  39. 435
  40. 81

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