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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 685 · 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. 1.152 × 4 =
  2. 2.46 × 8 =
  3. 3.107 × 4 =
  4. 4.61 × 8 =
  5. 5.20 × 4 =
  6. 6.70 × 4 =
  7. 7.75 × 8 =
  8. 8.59 × 4 =
  9. 9.21 × 4 =
  10. 10.60 × 8 =
  11. 11.45 × 4 =
  12. 12.36 × 4 =
  13. 13.78 × 4 =
  14. 14.106 × 4 =
  15. 15.62 × 8 =
  16. 16.64 × 4 =
  17. 17.150 × 4 =
  18. 18.143 × 4 =
  19. 19.54 × 4 =
  20. 20.159 × 4 =
  21. 21.64 × 4 =
  22. 22.49 × 4 =
  23. 23.44 × 4 =
  24. 24.30 × 4 =
  25. 25.73 × 8 =
  26. 26.60 × 4 =
  27. 27.33 × 8 =
  28. 28.20 × 8 =
  29. 29.65 × 4 =
  30. 30.121 × 4 =
  31. 31.19 × 4 =
  32. 32.51 × 4 =
  33. 33.133 × 4 =
  34. 34.51 × 4 =
  35. 35.26 × 8 =
  36. 36.18 × 8 =
  37. 37.106 × 4 =
  38. 38.15 × 8 =
  39. 39.31 × 4 =
  40. 40.26 × 4 =

Answer key

  1. 608
  2. 368
  3. 428
  4. 488
  5. 80
  6. 280
  7. 600
  8. 236
  9. 84
  10. 480
  11. 180
  12. 144
  13. 312
  14. 424
  15. 496
  16. 256
  17. 600
  18. 572
  19. 216
  20. 636
  21. 256
  22. 196
  23. 176
  24. 120
  25. 584
  26. 240
  27. 264
  28. 160
  29. 260
  30. 484
  31. 76
  32. 204
  33. 532
  34. 204
  35. 208
  36. 144
  37. 424
  38. 120
  39. 124
  40. 104

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