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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 651 · 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. 1.35 × 4 =
  2. 2.16 × 4 =
  3. 3.66 × 4 =
  4. 4.146 × 4 =
  5. 5.66 × 4 =
  6. 6.61 × 4 =
  7. 7.21 × 4 =
  8. 8.37 × 8 =
  9. 9.46 × 8 =
  10. 10.17 × 8 =
  11. 11.60 × 4 =
  12. 12.47 × 4 =
  13. 13.19 × 8 =
  14. 14.93 × 4 =
  15. 15.135 × 4 =
  16. 16.55 × 8 =
  17. 17.32 × 8 =
  18. 18.45 × 8 =
  19. 19.36 × 4 =
  20. 20.94 × 4 =
  21. 21.36 × 4 =
  22. 22.55 × 8 =
  23. 23.74 × 4 =
  24. 24.150 × 4 =
  25. 25.96 × 4 =
  26. 26.145 × 4 =
  27. 27.52 × 8 =
  28. 28.79 × 4 =
  29. 29.126 × 4 =
  30. 30.44 × 4 =
  31. 31.22 × 8 =
  32. 32.53 × 8 =
  33. 33.86 × 4 =
  34. 34.135 × 4 =
  35. 35.21 × 8 =
  36. 36.54 × 4 =
  37. 37.17 × 4 =
  38. 38.46 × 8 =
  39. 39.43 × 8 =
  40. 40.56 × 4 =

Answer key

  1. 140
  2. 64
  3. 264
  4. 584
  5. 264
  6. 244
  7. 84
  8. 296
  9. 368
  10. 136
  11. 240
  12. 188
  13. 152
  14. 372
  15. 540
  16. 440
  17. 256
  18. 360
  19. 144
  20. 376
  21. 144
  22. 440
  23. 296
  24. 600
  25. 384
  26. 580
  27. 416
  28. 316
  29. 504
  30. 176
  31. 176
  32. 424
  33. 344
  34. 540
  35. 168
  36. 216
  37. 68
  38. 368
  39. 344
  40. 224

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