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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 479 · 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. 1.67 × 4 =
  2. 2.41 × 8 =
  3. 3.82 × 4 =
  4. 4.75 × 4 =
  5. 5.48 × 4 =
  6. 6.153 × 4 =
  7. 7.55 × 8 =
  8. 8.102 × 4 =
  9. 9.37 × 4 =
  10. 10.16 × 8 =
  11. 11.27 × 8 =
  12. 12.67 × 4 =
  13. 13.24 × 8 =
  14. 14.14 × 4 =
  15. 15.36 × 4 =
  16. 16.44 × 4 =
  17. 17.94 × 4 =
  18. 18.85 × 4 =
  19. 19.40 × 8 =
  20. 20.41 × 4 =
  21. 21.60 × 8 =
  22. 22.25 × 8 =
  23. 23.51 × 4 =
  24. 24.80 × 4 =
  25. 25.27 × 8 =
  26. 26.103 × 4 =
  27. 27.117 × 4 =
  28. 28.129 × 4 =
  29. 29.28 × 8 =
  30. 30.54 × 8 =
  31. 31.28 × 8 =
  32. 32.64 × 8 =
  33. 33.13 × 8 =
  34. 34.104 × 4 =
  35. 35.39 × 8 =
  36. 36.37 × 8 =
  37. 37.66 × 8 =
  38. 38.22 × 4 =
  39. 39.63 × 8 =
  40. 40.21 × 4 =

Answer key

  1. 268
  2. 328
  3. 328
  4. 300
  5. 192
  6. 612
  7. 440
  8. 408
  9. 148
  10. 128
  11. 216
  12. 268
  13. 192
  14. 56
  15. 144
  16. 176
  17. 376
  18. 340
  19. 320
  20. 164
  21. 480
  22. 200
  23. 204
  24. 320
  25. 216
  26. 412
  27. 468
  28. 516
  29. 224
  30. 432
  31. 224
  32. 512
  33. 104
  34. 416
  35. 312
  36. 296
  37. 528
  38. 88
  39. 504
  40. 84

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