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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 64 · 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. 1.18 × 8 =
  2. 2.61 × 8 =
  3. 3.158 × 4 =
  4. 4.60 × 8 =
  5. 5.12 × 8 =
  6. 6.62 × 4 =
  7. 7.21 × 4 =
  8. 8.41 × 4 =
  9. 9.29 × 8 =
  10. 10.14 × 8 =
  11. 11.72 × 8 =
  12. 12.56 × 4 =
  13. 13.28 × 8 =
  14. 14.155 × 4 =
  15. 15.27 × 8 =
  16. 16.18 × 8 =
  17. 17.15 × 8 =
  18. 18.124 × 4 =
  19. 19.37 × 4 =
  20. 20.92 × 4 =
  21. 21.61 × 8 =
  22. 22.48 × 4 =
  23. 23.70 × 8 =
  24. 24.24 × 8 =
  25. 25.65 × 8 =
  26. 26.127 × 4 =
  27. 27.21 × 8 =
  28. 28.24 × 4 =
  29. 29.59 × 8 =
  30. 30.36 × 8 =
  31. 31.46 × 8 =
  32. 32.60 × 8 =
  33. 33.85 × 4 =
  34. 34.67 × 8 =
  35. 35.69 × 8 =
  36. 36.75 × 8 =
  37. 37.22 × 4 =
  38. 38.21 × 8 =
  39. 39.15 × 8 =
  40. 40.123 × 4 =

Answer key

  1. 144
  2. 488
  3. 632
  4. 480
  5. 96
  6. 248
  7. 84
  8. 164
  9. 232
  10. 112
  11. 576
  12. 224
  13. 224
  14. 620
  15. 216
  16. 144
  17. 120
  18. 496
  19. 148
  20. 368
  21. 488
  22. 192
  23. 560
  24. 192
  25. 520
  26. 508
  27. 168
  28. 96
  29. 472
  30. 288
  31. 368
  32. 480
  33. 340
  34. 536
  35. 552
  36. 600
  37. 88
  38. 168
  39. 120
  40. 492

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