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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 124 · 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. 1.44 × 8 =
  2. 2.61 × 8 =
  3. 3.57 × 4 =
  4. 4.28 × 8 =
  5. 5.50 × 4 =
  6. 6.31 × 8 =
  7. 7.156 × 4 =
  8. 8.24 × 8 =
  9. 9.55 × 8 =
  10. 10.18 × 8 =
  11. 11.26 × 8 =
  12. 12.148 × 4 =
  13. 13.54 × 4 =
  14. 14.51 × 8 =
  15. 15.30 × 8 =
  16. 16.100 × 4 =
  17. 17.130 × 4 =
  18. 18.27 × 8 =
  19. 19.44 × 8 =
  20. 20.46 × 8 =
  21. 21.66 × 4 =
  22. 22.75 × 4 =
  23. 23.36 × 8 =
  24. 24.63 × 8 =
  25. 25.27 × 8 =
  26. 26.74 × 4 =
  27. 27.145 × 4 =
  28. 28.27 × 8 =
  29. 29.94 × 4 =
  30. 30.60 × 8 =
  31. 31.127 × 4 =
  32. 32.85 × 4 =
  33. 33.106 × 4 =
  34. 34.152 × 4 =
  35. 35.141 × 4 =
  36. 36.63 × 4 =
  37. 37.48 × 8 =
  38. 38.131 × 4 =
  39. 39.40 × 8 =
  40. 40.36 × 4 =

Answer key

  1. 352
  2. 488
  3. 228
  4. 224
  5. 200
  6. 248
  7. 624
  8. 192
  9. 440
  10. 144
  11. 208
  12. 592
  13. 216
  14. 408
  15. 240
  16. 400
  17. 520
  18. 216
  19. 352
  20. 368
  21. 264
  22. 300
  23. 288
  24. 504
  25. 216
  26. 296
  27. 580
  28. 216
  29. 376
  30. 480
  31. 508
  32. 340
  33. 424
  34. 608
  35. 564
  36. 252
  37. 384
  38. 524
  39. 320
  40. 144

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