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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 446 · 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. 1.14 × 8 =
  2. 2.112 × 4 =
  3. 3.17 × 4 =
  4. 4.75 × 8 =
  5. 5.27 × 8 =
  6. 6.153 × 4 =
  7. 7.53 × 8 =
  8. 8.79 × 4 =
  9. 9.52 × 4 =
  10. 10.91 × 4 =
  11. 11.42 × 4 =
  12. 12.153 × 4 =
  13. 13.18 × 8 =
  14. 14.140 × 4 =
  15. 15.14 × 8 =
  16. 16.19 × 4 =
  17. 17.75 × 8 =
  18. 18.19 × 4 =
  19. 19.19 × 8 =
  20. 20.69 × 8 =
  21. 21.67 × 4 =
  22. 22.61 × 4 =
  23. 23.127 × 4 =
  24. 24.53 × 4 =
  25. 25.12 × 8 =
  26. 26.21 × 8 =
  27. 27.52 × 8 =
  28. 28.25 × 8 =
  29. 29.57 × 4 =
  30. 30.71 × 8 =
  31. 31.30 × 4 =
  32. 32.53 × 8 =
  33. 33.57 × 8 =
  34. 34.17 × 8 =
  35. 35.62 × 8 =
  36. 36.32 × 4 =
  37. 37.73 × 4 =
  38. 38.57 × 8 =
  39. 39.20 × 8 =
  40. 40.48 × 8 =

Answer key

  1. 112
  2. 448
  3. 68
  4. 600
  5. 216
  6. 612
  7. 424
  8. 316
  9. 208
  10. 364
  11. 168
  12. 612
  13. 144
  14. 560
  15. 112
  16. 76
  17. 600
  18. 76
  19. 152
  20. 552
  21. 268
  22. 244
  23. 508
  24. 212
  25. 96
  26. 168
  27. 416
  28. 200
  29. 228
  30. 568
  31. 120
  32. 424
  33. 456
  34. 136
  35. 496
  36. 128
  37. 292
  38. 456
  39. 160
  40. 384

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