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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 40 · 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. 1.13 × 4 =
  2. 2.68 × 8 =
  3. 3.106 × 4 =
  4. 4.14 × 8 =
  5. 5.29 × 4 =
  6. 6.144 × 4 =
  7. 7.110 × 4 =
  8. 8.97 × 4 =
  9. 9.40 × 4 =
  10. 10.20 × 4 =
  11. 11.29 × 8 =
  12. 12.35 × 4 =
  13. 13.71 × 8 =
  14. 14.15 × 8 =
  15. 15.26 × 8 =
  16. 16.151 × 4 =
  17. 17.24 × 8 =
  18. 18.37 × 8 =
  19. 19.104 × 4 =
  20. 20.144 × 4 =
  21. 21.95 × 4 =
  22. 22.72 × 8 =
  23. 23.29 × 8 =
  24. 24.74 × 8 =
  25. 25.45 × 4 =
  26. 26.79 × 4 =
  27. 27.52 × 4 =
  28. 28.35 × 8 =
  29. 29.21 × 8 =
  30. 30.50 × 8 =
  31. 31.72 × 8 =
  32. 32.140 × 4 =
  33. 33.37 × 4 =
  34. 34.32 × 8 =
  35. 35.56 × 8 =
  36. 36.51 × 8 =
  37. 37.118 × 4 =
  38. 38.30 × 8 =
  39. 39.68 × 4 =
  40. 40.31 × 8 =

Answer key

  1. 52
  2. 544
  3. 424
  4. 112
  5. 116
  6. 576
  7. 440
  8. 388
  9. 160
  10. 80
  11. 232
  12. 140
  13. 568
  14. 120
  15. 208
  16. 604
  17. 192
  18. 296
  19. 416
  20. 576
  21. 380
  22. 576
  23. 232
  24. 592
  25. 180
  26. 316
  27. 208
  28. 280
  29. 168
  30. 400
  31. 576
  32. 560
  33. 148
  34. 256
  35. 448
  36. 408
  37. 472
  38. 240
  39. 272
  40. 248

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