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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 891 · 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. 1.20 × 8 =
  2. 2.71 × 8 =
  3. 3.65 × 8 =
  4. 4.74 × 8 =
  5. 5.65 × 8 =
  6. 6.51 × 4 =
  7. 7.40 × 8 =
  8. 8.67 × 8 =
  9. 9.13 × 8 =
  10. 10.52 × 8 =
  11. 11.54 × 4 =
  12. 12.160 × 4 =
  13. 13.34 × 8 =
  14. 14.77 × 4 =
  15. 15.69 × 8 =
  16. 16.75 × 8 =
  17. 17.22 × 8 =
  18. 18.117 × 4 =
  19. 19.16 × 8 =
  20. 20.70 × 8 =
  21. 21.51 × 8 =
  22. 22.87 × 4 =
  23. 23.153 × 4 =
  24. 24.130 × 4 =
  25. 25.142 × 4 =
  26. 26.57 × 4 =
  27. 27.13 × 4 =
  28. 28.136 × 4 =
  29. 29.46 × 8 =
  30. 30.74 × 8 =
  31. 31.79 × 4 =
  32. 32.22 × 4 =
  33. 33.67 × 4 =
  34. 34.34 × 8 =
  35. 35.21 × 8 =
  36. 36.63 × 4 =
  37. 37.46 × 4 =
  38. 38.55 × 8 =
  39. 39.14 × 4 =
  40. 40.33 × 4 =

Answer key

  1. 160
  2. 568
  3. 520
  4. 592
  5. 520
  6. 204
  7. 320
  8. 536
  9. 104
  10. 416
  11. 216
  12. 640
  13. 272
  14. 308
  15. 552
  16. 600
  17. 176
  18. 468
  19. 128
  20. 560
  21. 408
  22. 348
  23. 612
  24. 520
  25. 568
  26. 228
  27. 52
  28. 544
  29. 368
  30. 592
  31. 316
  32. 88
  33. 268
  34. 272
  35. 168
  36. 252
  37. 184
  38. 440
  39. 56
  40. 132

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