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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 974 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.93 × 4 =
  2. 2.48 × 4 =
  3. 3.40 × 4 =
  4. 4.92 × 4 =
  5. 5.47 × 8 =
  6. 6.51 × 4 =
  7. 7.40 × 8 =
  8. 8.21 × 8 =
  9. 9.49 × 4 =
  10. 10.22 × 4 =
  11. 11.79 × 4 =
  12. 12.64 × 4 =
  13. 13.51 × 4 =
  14. 14.42 × 8 =
  15. 15.67 × 8 =
  16. 16.60 × 4 =
  17. 17.48 × 8 =
  18. 18.15 × 8 =
  19. 19.19 × 8 =
  20. 20.124 × 4 =
  21. 21.75 × 8 =
  22. 22.61 × 8 =
  23. 23.151 × 4 =
  24. 24.22 × 8 =
  25. 25.50 × 4 =
  26. 26.36 × 8 =
  27. 27.27 × 8 =
  28. 28.39 × 8 =
  29. 29.12 × 8 =
  30. 30.40 × 4 =
  31. 31.69 × 8 =
  32. 32.16 × 8 =
  33. 33.18 × 8 =
  34. 34.66 × 4 =
  35. 35.66 × 8 =
  36. 36.34 × 8 =
  37. 37.33 × 8 =
  38. 38.26 × 8 =
  39. 39.26 × 8 =
  40. 40.38 × 8 =

Answer key

  1. 372
  2. 192
  3. 160
  4. 368
  5. 376
  6. 204
  7. 320
  8. 168
  9. 196
  10. 88
  11. 316
  12. 256
  13. 204
  14. 336
  15. 536
  16. 240
  17. 384
  18. 120
  19. 152
  20. 496
  21. 600
  22. 488
  23. 604
  24. 176
  25. 200
  26. 288
  27. 216
  28. 312
  29. 96
  30. 160
  31. 552
  32. 128
  33. 144
  34. 264
  35. 528
  36. 272
  37. 264
  38. 208
  39. 208
  40. 304

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