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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 752 · 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. 1.27 × 4 =
  2. 2.91 × 4 =
  3. 3.93 × 4 =
  4. 4.13 × 8 =
  5. 5.71 × 8 =
  6. 6.19 × 8 =
  7. 7.20 × 4 =
  8. 8.53 × 8 =
  9. 9.18 × 8 =
  10. 10.35 × 4 =
  11. 11.141 × 4 =
  12. 12.57 × 4 =
  13. 13.20 × 4 =
  14. 14.69 × 4 =
  15. 15.143 × 4 =
  16. 16.24 × 8 =
  17. 17.132 × 4 =
  18. 18.118 × 4 =
  19. 19.23 × 4 =
  20. 20.52 × 4 =
  21. 21.103 × 4 =
  22. 22.21 × 8 =
  23. 23.53 × 8 =
  24. 24.60 × 4 =
  25. 25.75 × 8 =
  26. 26.59 × 8 =
  27. 27.140 × 4 =
  28. 28.66 × 8 =
  29. 29.58 × 8 =
  30. 30.85 × 4 =
  31. 31.37 × 4 =
  32. 32.158 × 4 =
  33. 33.48 × 4 =
  34. 34.25 × 8 =
  35. 35.16 × 8 =
  36. 36.74 × 4 =
  37. 37.69 × 4 =
  38. 38.35 × 4 =
  39. 39.116 × 4 =
  40. 40.22 × 8 =

Answer key

  1. 108
  2. 364
  3. 372
  4. 104
  5. 568
  6. 152
  7. 80
  8. 424
  9. 144
  10. 140
  11. 564
  12. 228
  13. 80
  14. 276
  15. 572
  16. 192
  17. 528
  18. 472
  19. 92
  20. 208
  21. 412
  22. 168
  23. 424
  24. 240
  25. 600
  26. 472
  27. 560
  28. 528
  29. 464
  30. 340
  31. 148
  32. 632
  33. 192
  34. 200
  35. 128
  36. 296
  37. 276
  38. 140
  39. 464
  40. 176

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