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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 17 · 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. 1.27 × 4 =
  2. 2.59 × 8 =
  3. 3.67 × 4 =
  4. 4.51 × 8 =
  5. 5.20 × 8 =
  6. 6.43 × 4 =
  7. 7.46 × 4 =
  8. 8.16 × 8 =
  9. 9.12 × 8 =
  10. 10.112 × 4 =
  11. 11.100 × 4 =
  12. 12.18 × 8 =
  13. 13.24 × 4 =
  14. 14.124 × 4 =
  15. 15.52 × 4 =
  16. 16.47 × 8 =
  17. 17.62 × 8 =
  18. 18.42 × 4 =
  19. 19.60 × 4 =
  20. 20.47 × 8 =
  21. 21.58 × 4 =
  22. 22.35 × 4 =
  23. 23.65 × 8 =
  24. 24.58 × 8 =
  25. 25.29 × 8 =
  26. 26.27 × 4 =
  27. 27.42 × 8 =
  28. 28.70 × 8 =
  29. 29.110 × 4 =
  30. 30.67 × 8 =
  31. 31.88 × 4 =
  32. 32.106 × 4 =
  33. 33.96 × 4 =
  34. 34.19 × 8 =
  35. 35.20 × 4 =
  36. 36.37 × 8 =
  37. 37.90 × 4 =
  38. 38.48 × 4 =
  39. 39.30 × 4 =
  40. 40.21 × 8 =

Answer key

  1. 108
  2. 472
  3. 268
  4. 408
  5. 160
  6. 172
  7. 184
  8. 128
  9. 96
  10. 448
  11. 400
  12. 144
  13. 96
  14. 496
  15. 208
  16. 376
  17. 496
  18. 168
  19. 240
  20. 376
  21. 232
  22. 140
  23. 520
  24. 464
  25. 232
  26. 108
  27. 336
  28. 560
  29. 440
  30. 536
  31. 352
  32. 424
  33. 384
  34. 152
  35. 80
  36. 296
  37. 360
  38. 192
  39. 120
  40. 168

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