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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 181 · 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. 1.28 × 4 =
  2. 2.53 × 4 =
  3. 3.38 × 8 =
  4. 4.24 × 8 =
  5. 5.80 × 4 =
  6. 6.16 × 4 =
  7. 7.69 × 8 =
  8. 8.28 × 4 =
  9. 9.49 × 4 =
  10. 10.52 × 4 =
  11. 11.148 × 4 =
  12. 12.142 × 4 =
  13. 13.24 × 8 =
  14. 14.58 × 8 =
  15. 15.75 × 4 =
  16. 16.119 × 4 =
  17. 17.31 × 8 =
  18. 18.60 × 8 =
  19. 19.32 × 8 =
  20. 20.25 × 8 =
  21. 21.42 × 8 =
  22. 22.40 × 8 =
  23. 23.115 × 4 =
  24. 24.28 × 4 =
  25. 25.82 × 4 =
  26. 26.74 × 4 =
  27. 27.110 × 4 =
  28. 28.41 × 4 =
  29. 29.36 × 8 =
  30. 30.30 × 4 =
  31. 31.68 × 8 =
  32. 32.23 × 8 =
  33. 33.57 × 4 =
  34. 34.152 × 4 =
  35. 35.13 × 8 =
  36. 36.96 × 4 =
  37. 37.33 × 8 =
  38. 38.62 × 8 =
  39. 39.44 × 8 =
  40. 40.34 × 8 =

Answer key

  1. 112
  2. 212
  3. 304
  4. 192
  5. 320
  6. 64
  7. 552
  8. 112
  9. 196
  10. 208
  11. 592
  12. 568
  13. 192
  14. 464
  15. 300
  16. 476
  17. 248
  18. 480
  19. 256
  20. 200
  21. 336
  22. 320
  23. 460
  24. 112
  25. 328
  26. 296
  27. 440
  28. 164
  29. 288
  30. 120
  31. 544
  32. 184
  33. 228
  34. 608
  35. 104
  36. 384
  37. 264
  38. 496
  39. 352
  40. 272

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