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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 94 · 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. 1.43 × 4 =
  2. 2.53 × 8 =
  3. 3.26 × 8 =
  4. 4.22 × 4 =
  5. 5.55 × 8 =
  6. 6.34 × 8 =
  7. 7.21 × 4 =
  8. 8.52 × 8 =
  9. 9.30 × 8 =
  10. 10.18 × 8 =
  11. 11.94 × 4 =
  12. 12.81 × 4 =
  13. 13.26 × 4 =
  14. 14.26 × 4 =
  15. 15.67 × 4 =
  16. 16.66 × 4 =
  17. 17.28 × 8 =
  18. 18.96 × 4 =
  19. 19.19 × 4 =
  20. 20.31 × 8 =
  21. 21.14 × 8 =
  22. 22.38 × 4 =
  23. 23.138 × 4 =
  24. 24.32 × 4 =
  25. 25.125 × 4 =
  26. 26.20 × 8 =
  27. 27.35 × 4 =
  28. 28.49 × 4 =
  29. 29.27 × 4 =
  30. 30.24 × 4 =
  31. 31.24 × 4 =
  32. 32.33 × 8 =
  33. 33.31 × 8 =
  34. 34.68 × 4 =
  35. 35.60 × 8 =
  36. 36.112 × 4 =
  37. 37.113 × 4 =
  38. 38.85 × 4 =
  39. 39.53 × 8 =
  40. 40.112 × 4 =

Answer key

  1. 172
  2. 424
  3. 208
  4. 88
  5. 440
  6. 272
  7. 84
  8. 416
  9. 240
  10. 144
  11. 376
  12. 324
  13. 104
  14. 104
  15. 268
  16. 264
  17. 224
  18. 384
  19. 76
  20. 248
  21. 112
  22. 152
  23. 552
  24. 128
  25. 500
  26. 160
  27. 140
  28. 196
  29. 108
  30. 96
  31. 96
  32. 264
  33. 248
  34. 272
  35. 480
  36. 448
  37. 452
  38. 340
  39. 424
  40. 448

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