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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 784 · 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. 1.18 × 8 =
  2. 2.70 × 8 =
  3. 3.78 × 4 =
  4. 4.18 × 8 =
  5. 5.121 × 4 =
  6. 6.39 × 8 =
  7. 7.54 × 4 =
  8. 8.119 × 4 =
  9. 9.138 × 4 =
  10. 10.118 × 4 =
  11. 11.22 × 8 =
  12. 12.88 × 4 =
  13. 13.53 × 4 =
  14. 14.18 × 8 =
  15. 15.129 × 4 =
  16. 16.51 × 4 =
  17. 17.49 × 4 =
  18. 18.104 × 4 =
  19. 19.139 × 4 =
  20. 20.68 × 4 =
  21. 21.25 × 8 =
  22. 22.57 × 8 =
  23. 23.37 × 4 =
  24. 24.29 × 8 =
  25. 25.104 × 4 =
  26. 26.61 × 4 =
  27. 27.75 × 4 =
  28. 28.13 × 4 =
  29. 29.46 × 8 =
  30. 30.68 × 8 =
  31. 31.51 × 8 =
  32. 32.87 × 4 =
  33. 33.66 × 4 =
  34. 34.21 × 4 =
  35. 35.160 × 4 =
  36. 36.71 × 8 =
  37. 37.27 × 8 =
  38. 38.30 × 8 =
  39. 39.111 × 4 =
  40. 40.50 × 4 =

Answer key

  1. 144
  2. 560
  3. 312
  4. 144
  5. 484
  6. 312
  7. 216
  8. 476
  9. 552
  10. 472
  11. 176
  12. 352
  13. 212
  14. 144
  15. 516
  16. 204
  17. 196
  18. 416
  19. 556
  20. 272
  21. 200
  22. 456
  23. 148
  24. 232
  25. 416
  26. 244
  27. 300
  28. 52
  29. 368
  30. 544
  31. 408
  32. 348
  33. 264
  34. 84
  35. 640
  36. 568
  37. 216
  38. 240
  39. 444
  40. 200

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