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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 252 · 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. 1.80 × 4 =
  2. 2.81 × 4 =
  3. 3.43 × 4 =
  4. 4.62 × 4 =
  5. 5.58 × 4 =
  6. 6.124 × 4 =
  7. 7.16 × 8 =
  8. 8.61 × 4 =
  9. 9.106 × 4 =
  10. 10.62 × 4 =
  11. 11.151 × 4 =
  12. 12.115 × 4 =
  13. 13.57 × 8 =
  14. 14.28 × 8 =
  15. 15.16 × 4 =
  16. 16.150 × 4 =
  17. 17.35 × 8 =
  18. 18.125 × 4 =
  19. 19.48 × 4 =
  20. 20.68 × 8 =
  21. 21.39 × 4 =
  22. 22.50 × 8 =
  23. 23.53 × 4 =
  24. 24.30 × 8 =
  25. 25.70 × 4 =
  26. 26.58 × 8 =
  27. 27.73 × 8 =
  28. 28.33 × 8 =
  29. 29.120 × 4 =
  30. 30.12 × 8 =
  31. 31.28 × 8 =
  32. 32.41 × 4 =
  33. 33.134 × 4 =
  34. 34.40 × 8 =
  35. 35.104 × 4 =
  36. 36.43 × 4 =
  37. 37.42 × 8 =
  38. 38.132 × 4 =
  39. 39.37 × 8 =
  40. 40.43 × 4 =

Answer key

  1. 320
  2. 324
  3. 172
  4. 248
  5. 232
  6. 496
  7. 128
  8. 244
  9. 424
  10. 248
  11. 604
  12. 460
  13. 456
  14. 224
  15. 64
  16. 600
  17. 280
  18. 500
  19. 192
  20. 544
  21. 156
  22. 400
  23. 212
  24. 240
  25. 280
  26. 464
  27. 584
  28. 264
  29. 480
  30. 96
  31. 224
  32. 164
  33. 536
  34. 320
  35. 416
  36. 172
  37. 336
  38. 528
  39. 296
  40. 172

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