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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 612 · 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. 1.15 × 4 =
  2. 2.48 × 4 =
  3. 3.51 × 4 =
  4. 4.40 × 8 =
  5. 5.95 × 4 =
  6. 6.47 × 4 =
  7. 7.52 × 4 =
  8. 8.74 × 8 =
  9. 9.126 × 4 =
  10. 10.23 × 8 =
  11. 11.44 × 8 =
  12. 12.34 × 8 =
  13. 13.115 × 4 =
  14. 14.66 × 8 =
  15. 15.80 × 4 =
  16. 16.24 × 8 =
  17. 17.18 × 4 =
  18. 18.46 × 4 =
  19. 19.130 × 4 =
  20. 20.12 × 8 =
  21. 21.62 × 4 =
  22. 22.61 × 4 =
  23. 23.28 × 8 =
  24. 24.72 × 4 =
  25. 25.34 × 4 =
  26. 26.26 × 8 =
  27. 27.61 × 8 =
  28. 28.83 × 4 =
  29. 29.19 × 4 =
  30. 30.50 × 8 =
  31. 31.32 × 4 =
  32. 32.71 × 8 =
  33. 33.30 × 8 =
  34. 34.123 × 4 =
  35. 35.20 × 8 =
  36. 36.16 × 8 =
  37. 37.22 × 8 =
  38. 38.63 × 8 =
  39. 39.71 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 60
  2. 192
  3. 204
  4. 320
  5. 380
  6. 188
  7. 208
  8. 592
  9. 504
  10. 184
  11. 352
  12. 272
  13. 460
  14. 528
  15. 320
  16. 192
  17. 72
  18. 184
  19. 520
  20. 96
  21. 248
  22. 244
  23. 224
  24. 288
  25. 136
  26. 208
  27. 488
  28. 332
  29. 76
  30. 400
  31. 128
  32. 568
  33. 240
  34. 492
  35. 160
  36. 128
  37. 176
  38. 504
  39. 284
  40. 192

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