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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 518 · 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. 1.11 × 99 =
  2. 2.13 × 19 =
  3. 3.6 × 29 =
  4. 4.20 × 98 =
  5. 5.8 × 9 =
  6. 6.6 × 29 =
  7. 7.12 × 98 =
  8. 8.9 × 49 =
  9. 9.13 × 29 =
  10. 10.36 × 99 =
  11. 11.12 × 98 =
  12. 12.15 × 9 =
  13. 13.36 × 98 =
  14. 14.39 × 99 =
  15. 15.14 × 9 =
  16. 16.4 × 29 =
  17. 17.12 × 19 =
  18. 18.40 × 99 =
  19. 19.20 × 98 =
  20. 20.5 × 19 =
  21. 21.13 × 29 =
  22. 22.11 × 98 =
  23. 23.11 × 98 =
  24. 24.19 × 99 =
  25. 25.14 × 19 =
  26. 26.33 × 98 =
  27. 27.14 × 98 =
  28. 28.21 × 99 =
  29. 29.5 × 98 =
  30. 30.8 × 49 =
  31. 31.9 × 49 =
  32. 32.5 × 19 =
  33. 33.14 × 19 =
  34. 34.7 × 29 =
  35. 35.15 × 49 =
  36. 36.10 × 99 =
  37. 37.26 × 99 =
  38. 38.8 × 29 =
  39. 39.3 × 9 =
  40. 40.11 × 19 =

Answer key

  1. 1089
  2. 247
  3. 174
  4. 1960
  5. 72
  6. 174
  7. 1176
  8. 441
  9. 377
  10. 3564
  11. 1176
  12. 135
  13. 3528
  14. 3861
  15. 126
  16. 116
  17. 228
  18. 3960
  19. 1960
  20. 95
  21. 377
  22. 1078
  23. 1078
  24. 1881
  25. 266
  26. 3234
  27. 1372
  28. 2079
  29. 490
  30. 392
  31. 441
  32. 95
  33. 266
  34. 203
  35. 735
  36. 990
  37. 2574
  38. 232
  39. 27
  40. 209

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