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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 856 · 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. 1.69 × 4 =
  2. 2.41 × 4 =
  3. 3.117 × 4 =
  4. 4.112 × 4 =
  5. 5.56 × 4 =
  6. 6.116 × 4 =
  7. 7.39 × 8 =
  8. 8.12 × 8 =
  9. 9.21 × 8 =
  10. 10.87 × 4 =
  11. 11.118 × 4 =
  12. 12.81 × 4 =
  13. 13.152 × 4 =
  14. 14.60 × 8 =
  15. 15.56 × 4 =
  16. 16.106 × 4 =
  17. 17.50 × 8 =
  18. 18.54 × 8 =
  19. 19.19 × 8 =
  20. 20.113 × 4 =
  21. 21.51 × 8 =
  22. 22.132 × 4 =
  23. 23.32 × 4 =
  24. 24.29 × 8 =
  25. 25.65 × 8 =
  26. 26.108 × 4 =
  27. 27.14 × 8 =
  28. 28.32 × 8 =
  29. 29.25 × 8 =
  30. 30.59 × 8 =
  31. 31.17 × 8 =
  32. 32.42 × 4 =
  33. 33.43 × 4 =
  34. 34.24 × 8 =
  35. 35.46 × 8 =
  36. 36.75 × 4 =
  37. 37.25 × 4 =
  38. 38.15 × 8 =
  39. 39.65 × 8 =
  40. 40.95 × 4 =

Answer key

  1. 276
  2. 164
  3. 468
  4. 448
  5. 224
  6. 464
  7. 312
  8. 96
  9. 168
  10. 348
  11. 472
  12. 324
  13. 608
  14. 480
  15. 224
  16. 424
  17. 400
  18. 432
  19. 152
  20. 452
  21. 408
  22. 528
  23. 128
  24. 232
  25. 520
  26. 432
  27. 112
  28. 256
  29. 200
  30. 472
  31. 136
  32. 168
  33. 172
  34. 192
  35. 368
  36. 300
  37. 100
  38. 120
  39. 520
  40. 380

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