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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 462 · 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. 1.28 × 8 =
  2. 2.114 × 4 =
  3. 3.130 × 4 =
  4. 4.34 × 8 =
  5. 5.36 × 8 =
  6. 6.30 × 8 =
  7. 7.60 × 8 =
  8. 8.69 × 8 =
  9. 9.105 × 4 =
  10. 10.104 × 4 =
  11. 11.87 × 4 =
  12. 12.137 × 4 =
  13. 13.17 × 4 =
  14. 14.21 × 8 =
  15. 15.57 × 8 =
  16. 16.54 × 4 =
  17. 17.138 × 4 =
  18. 18.52 × 4 =
  19. 19.55 × 8 =
  20. 20.105 × 4 =
  21. 21.34 × 4 =
  22. 22.12 × 8 =
  23. 23.44 × 8 =
  24. 24.33 × 4 =
  25. 25.16 × 8 =
  26. 26.133 × 4 =
  27. 27.26 × 8 =
  28. 28.58 × 8 =
  29. 29.51 × 8 =
  30. 30.25 × 8 =
  31. 31.150 × 4 =
  32. 32.45 × 8 =
  33. 33.54 × 8 =
  34. 34.149 × 4 =
  35. 35.152 × 4 =
  36. 36.71 × 4 =
  37. 37.39 × 4 =
  38. 38.70 × 8 =
  39. 39.72 × 8 =
  40. 40.34 × 4 =

Answer key

  1. 224
  2. 456
  3. 520
  4. 272
  5. 288
  6. 240
  7. 480
  8. 552
  9. 420
  10. 416
  11. 348
  12. 548
  13. 68
  14. 168
  15. 456
  16. 216
  17. 552
  18. 208
  19. 440
  20. 420
  21. 136
  22. 96
  23. 352
  24. 132
  25. 128
  26. 532
  27. 208
  28. 464
  29. 408
  30. 200
  31. 600
  32. 360
  33. 432
  34. 596
  35. 608
  36. 284
  37. 156
  38. 560
  39. 576
  40. 136

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