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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 717 · 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. 1.108 × 4 =
  2. 2.58 × 4 =
  3. 3.64 × 8 =
  4. 4.20 × 8 =
  5. 5.13 × 8 =
  6. 6.115 × 4 =
  7. 7.16 × 8 =
  8. 8.27 × 8 =
  9. 9.54 × 8 =
  10. 10.31 × 8 =
  11. 11.64 × 8 =
  12. 12.109 × 4 =
  13. 13.36 × 4 =
  14. 14.70 × 8 =
  15. 15.68 × 8 =
  16. 16.59 × 8 =
  17. 17.54 × 8 =
  18. 18.69 × 8 =
  19. 19.76 × 4 =
  20. 20.142 × 4 =
  21. 21.107 × 4 =
  22. 22.93 × 4 =
  23. 23.50 × 8 =
  24. 24.42 × 8 =
  25. 25.108 × 4 =
  26. 26.74 × 8 =
  27. 27.57 × 8 =
  28. 28.31 × 8 =
  29. 29.46 × 8 =
  30. 30.24 × 8 =
  31. 31.145 × 4 =
  32. 32.75 × 8 =
  33. 33.157 × 4 =
  34. 34.13 × 8 =
  35. 35.55 × 4 =
  36. 36.68 × 4 =
  37. 37.29 × 8 =
  38. 38.70 × 8 =
  39. 39.38 × 8 =
  40. 40.37 × 4 =

Answer key

  1. 432
  2. 232
  3. 512
  4. 160
  5. 104
  6. 460
  7. 128
  8. 216
  9. 432
  10. 248
  11. 512
  12. 436
  13. 144
  14. 560
  15. 544
  16. 472
  17. 432
  18. 552
  19. 304
  20. 568
  21. 428
  22. 372
  23. 400
  24. 336
  25. 432
  26. 592
  27. 456
  28. 248
  29. 368
  30. 192
  31. 580
  32. 600
  33. 628
  34. 104
  35. 220
  36. 272
  37. 232
  38. 560
  39. 304
  40. 148

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