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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 256 · 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. 1.10 × 49 =
  2. 2.5 × 19 =
  3. 3.39 × 99 =
  4. 4.10 × 99 =
  5. 5.10 × 29 =
  6. 6.9 × 19 =
  7. 7.8 × 29 =
  8. 8.23 × 99 =
  9. 9.4 × 19 =
  10. 10.9 × 19 =
  11. 11.11 × 9 =
  12. 12.8 × 99 =
  13. 13.29 × 99 =
  14. 14.14 × 19 =
  15. 15.11 × 9 =
  16. 16.38 × 98 =
  17. 17.7 × 29 =
  18. 18.4 × 49 =
  19. 19.9 × 49 =
  20. 20.35 × 99 =
  21. 21.8 × 19 =
  22. 22.27 × 99 =
  23. 23.8 × 19 =
  24. 24.13 × 98 =
  25. 25.10 × 19 =
  26. 26.14 × 98 =
  27. 27.4 × 49 =
  28. 28.12 × 19 =
  29. 29.26 × 99 =
  30. 30.11 × 19 =
  31. 31.10 × 49 =
  32. 32.13 × 19 =
  33. 33.14 × 9 =
  34. 34.24 × 99 =
  35. 35.4 × 29 =
  36. 36.4 × 49 =
  37. 37.32 × 98 =
  38. 38.3 × 98 =
  39. 39.7 × 19 =
  40. 40.17 × 98 =

Answer key

  1. 490
  2. 95
  3. 3861
  4. 990
  5. 290
  6. 171
  7. 232
  8. 2277
  9. 76
  10. 171
  11. 99
  12. 792
  13. 2871
  14. 266
  15. 99
  16. 3724
  17. 203
  18. 196
  19. 441
  20. 3465
  21. 152
  22. 2673
  23. 152
  24. 1274
  25. 190
  26. 1372
  27. 196
  28. 228
  29. 2574
  30. 209
  31. 490
  32. 247
  33. 126
  34. 2376
  35. 116
  36. 196
  37. 3136
  38. 294
  39. 133
  40. 1666

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