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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 847 · 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. 1.48 × 4 =
  2. 2.96 × 4 =
  3. 3.97 × 4 =
  4. 4.121 × 4 =
  5. 5.24 × 8 =
  6. 6.95 × 4 =
  7. 7.40 × 4 =
  8. 8.40 × 8 =
  9. 9.58 × 4 =
  10. 10.24 × 8 =
  11. 11.28 × 8 =
  12. 12.33 × 8 =
  13. 13.62 × 4 =
  14. 14.12 × 8 =
  15. 15.15 × 8 =
  16. 16.124 × 4 =
  17. 17.72 × 4 =
  18. 18.88 × 4 =
  19. 19.34 × 4 =
  20. 20.66 × 4 =
  21. 21.46 × 4 =
  22. 22.41 × 4 =
  23. 23.91 × 4 =
  24. 24.68 × 8 =
  25. 25.60 × 4 =
  26. 26.60 × 8 =
  27. 27.65 × 8 =
  28. 28.124 × 4 =
  29. 29.34 × 8 =
  30. 30.110 × 4 =
  31. 31.97 × 4 =
  32. 32.23 × 4 =
  33. 33.46 × 4 =
  34. 34.109 × 4 =
  35. 35.55 × 4 =
  36. 36.148 × 4 =
  37. 37.144 × 4 =
  38. 38.44 × 8 =
  39. 39.15 × 4 =
  40. 40.154 × 4 =

Answer key

  1. 192
  2. 384
  3. 388
  4. 484
  5. 192
  6. 380
  7. 160
  8. 320
  9. 232
  10. 192
  11. 224
  12. 264
  13. 248
  14. 96
  15. 120
  16. 496
  17. 288
  18. 352
  19. 136
  20. 264
  21. 184
  22. 164
  23. 364
  24. 544
  25. 240
  26. 480
  27. 520
  28. 496
  29. 272
  30. 440
  31. 388
  32. 92
  33. 184
  34. 436
  35. 220
  36. 592
  37. 576
  38. 352
  39. 60
  40. 616

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