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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 279 · 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. 1.127 × 4 =
  2. 2.58 × 8 =
  3. 3.70 × 8 =
  4. 4.72 × 8 =
  5. 5.57 × 4 =
  6. 6.33 × 4 =
  7. 7.158 × 4 =
  8. 8.44 × 8 =
  9. 9.19 × 8 =
  10. 10.19 × 4 =
  11. 11.40 × 4 =
  12. 12.25 × 8 =
  13. 13.16 × 8 =
  14. 14.16 × 4 =
  15. 15.117 × 4 =
  16. 16.129 × 4 =
  17. 17.71 × 8 =
  18. 18.33 × 8 =
  19. 19.144 × 4 =
  20. 20.119 × 4 =
  21. 21.68 × 8 =
  22. 22.31 × 8 =
  23. 23.85 × 4 =
  24. 24.23 × 8 =
  25. 25.30 × 4 =
  26. 26.21 × 8 =
  27. 27.56 × 4 =
  28. 28.38 × 4 =
  29. 29.65 × 8 =
  30. 30.54 × 4 =
  31. 31.53 × 4 =
  32. 32.66 × 8 =
  33. 33.98 × 4 =
  34. 34.14 × 8 =
  35. 35.141 × 4 =
  36. 36.13 × 8 =
  37. 37.49 × 4 =
  38. 38.30 × 4 =
  39. 39.39 × 4 =
  40. 40.39 × 8 =

Answer key

  1. 508
  2. 464
  3. 560
  4. 576
  5. 228
  6. 132
  7. 632
  8. 352
  9. 152
  10. 76
  11. 160
  12. 200
  13. 128
  14. 64
  15. 468
  16. 516
  17. 568
  18. 264
  19. 576
  20. 476
  21. 544
  22. 248
  23. 340
  24. 184
  25. 120
  26. 168
  27. 224
  28. 152
  29. 520
  30. 216
  31. 212
  32. 528
  33. 392
  34. 112
  35. 564
  36. 104
  37. 196
  38. 120
  39. 156
  40. 312

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