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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 905 · 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. 1.60 × 4 =
  2. 2.91 × 4 =
  3. 3.74 × 4 =
  4. 4.63 × 4 =
  5. 5.48 × 8 =
  6. 6.22 × 4 =
  7. 7.59 × 4 =
  8. 8.45 × 4 =
  9. 9.15 × 8 =
  10. 10.46 × 8 =
  11. 11.29 × 8 =
  12. 12.13 × 4 =
  13. 13.71 × 4 =
  14. 14.69 × 8 =
  15. 15.62 × 4 =
  16. 16.32 × 4 =
  17. 17.93 × 4 =
  18. 18.21 × 4 =
  19. 19.42 × 4 =
  20. 20.55 × 4 =
  21. 21.52 × 8 =
  22. 22.29 × 8 =
  23. 23.31 × 8 =
  24. 24.107 × 4 =
  25. 25.36 × 8 =
  26. 26.122 × 4 =
  27. 27.93 × 4 =
  28. 28.62 × 8 =
  29. 29.128 × 4 =
  30. 30.32 × 8 =
  31. 31.34 × 4 =
  32. 32.71 × 4 =
  33. 33.54 × 4 =
  34. 34.149 × 4 =
  35. 35.14 × 8 =
  36. 36.22 × 8 =
  37. 37.49 × 8 =
  38. 38.29 × 4 =
  39. 39.94 × 4 =
  40. 40.46 × 4 =

Answer key

  1. 240
  2. 364
  3. 296
  4. 252
  5. 384
  6. 88
  7. 236
  8. 180
  9. 120
  10. 368
  11. 232
  12. 52
  13. 284
  14. 552
  15. 248
  16. 128
  17. 372
  18. 84
  19. 168
  20. 220
  21. 416
  22. 232
  23. 248
  24. 428
  25. 288
  26. 488
  27. 372
  28. 496
  29. 512
  30. 256
  31. 136
  32. 284
  33. 216
  34. 596
  35. 112
  36. 176
  37. 392
  38. 116
  39. 376
  40. 184

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