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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 976 · 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. 1.25 × 98 =
  2. 2.12 × 9 =
  3. 3.8 × 19 =
  4. 4.11 × 19 =
  5. 5.13 × 98 =
  6. 6.24 × 98 =
  7. 7.4 × 29 =
  8. 8.9 × 29 =
  9. 9.15 × 9 =
  10. 10.22 × 99 =
  11. 11.4 × 19 =
  12. 12.3 × 9 =
  13. 13.14 × 9 =
  14. 14.15 × 19 =
  15. 15.8 × 29 =
  16. 16.12 × 99 =
  17. 17.22 × 99 =
  18. 18.9 × 99 =
  19. 19.32 × 98 =
  20. 20.11 × 29 =
  21. 21.8 × 9 =
  22. 22.4 × 49 =
  23. 23.32 × 99 =
  24. 24.11 × 9 =
  25. 25.3 × 49 =
  26. 26.6 × 29 =
  27. 27.4 × 9 =
  28. 28.12 × 49 =
  29. 29.8 × 9 =
  30. 30.5 × 98 =
  31. 31.27 × 99 =
  32. 32.7 × 99 =
  33. 33.30 × 99 =
  34. 34.7 × 19 =
  35. 35.24 × 99 =
  36. 36.10 × 29 =
  37. 37.12 × 19 =
  38. 38.3 × 29 =
  39. 39.5 × 9 =
  40. 40.10 × 9 =

Answer key

  1. 2450
  2. 108
  3. 152
  4. 209
  5. 1274
  6. 2352
  7. 116
  8. 261
  9. 135
  10. 2178
  11. 76
  12. 27
  13. 126
  14. 285
  15. 232
  16. 1188
  17. 2178
  18. 891
  19. 3136
  20. 319
  21. 72
  22. 196
  23. 3168
  24. 99
  25. 147
  26. 174
  27. 36
  28. 588
  29. 72
  30. 490
  31. 2673
  32. 693
  33. 2970
  34. 133
  35. 2376
  36. 290
  37. 228
  38. 87
  39. 45
  40. 90

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