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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 867 · 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. 1.28 × 4 =
  2. 2.125 × 4 =
  3. 3.26 × 4 =
  4. 4.43 × 8 =
  5. 5.55 × 8 =
  6. 6.48 × 4 =
  7. 7.12 × 8 =
  8. 8.145 × 4 =
  9. 9.45 × 4 =
  10. 10.131 × 4 =
  11. 11.63 × 8 =
  12. 12.126 × 4 =
  13. 13.123 × 4 =
  14. 14.49 × 8 =
  15. 15.58 × 8 =
  16. 16.55 × 8 =
  17. 17.66 × 4 =
  18. 18.62 × 4 =
  19. 19.37 × 4 =
  20. 20.65 × 4 =
  21. 21.38 × 8 =
  22. 22.31 × 8 =
  23. 23.21 × 4 =
  24. 24.29 × 8 =
  25. 25.75 × 4 =
  26. 26.105 × 4 =
  27. 27.27 × 8 =
  28. 28.16 × 4 =
  29. 29.32 × 4 =
  30. 30.112 × 4 =
  31. 31.93 × 4 =
  32. 32.73 × 8 =
  33. 33.46 × 8 =
  34. 34.19 × 8 =
  35. 35.79 × 4 =
  36. 36.29 × 8 =
  37. 37.52 × 8 =
  38. 38.49 × 4 =
  39. 39.57 × 8 =
  40. 40.65 × 8 =

Answer key

  1. 112
  2. 500
  3. 104
  4. 344
  5. 440
  6. 192
  7. 96
  8. 580
  9. 180
  10. 524
  11. 504
  12. 504
  13. 492
  14. 392
  15. 464
  16. 440
  17. 264
  18. 248
  19. 148
  20. 260
  21. 304
  22. 248
  23. 84
  24. 232
  25. 300
  26. 420
  27. 216
  28. 64
  29. 128
  30. 448
  31. 372
  32. 584
  33. 368
  34. 152
  35. 316
  36. 232
  37. 416
  38. 196
  39. 456
  40. 520

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