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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 799 · 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. 1.37 × 8 =
  2. 2.65 × 4 =
  3. 3.118 × 4 =
  4. 4.68 × 8 =
  5. 5.31 × 8 =
  6. 6.25 × 8 =
  7. 7.57 × 8 =
  8. 8.72 × 8 =
  9. 9.20 × 8 =
  10. 10.27 × 8 =
  11. 11.119 × 4 =
  12. 12.49 × 4 =
  13. 13.33 × 8 =
  14. 14.103 × 4 =
  15. 15.57 × 8 =
  16. 16.125 × 4 =
  17. 17.20 × 8 =
  18. 18.48 × 4 =
  19. 19.127 × 4 =
  20. 20.28 × 8 =
  21. 21.16 × 8 =
  22. 22.63 × 8 =
  23. 23.63 × 4 =
  24. 24.27 × 4 =
  25. 25.23 × 4 =
  26. 26.76 × 4 =
  27. 27.29 × 4 =
  28. 28.152 × 4 =
  29. 29.95 × 4 =
  30. 30.14 × 8 =
  31. 31.27 × 8 =
  32. 32.112 × 4 =
  33. 33.157 × 4 =
  34. 34.47 × 8 =
  35. 35.49 × 4 =
  36. 36.99 × 4 =
  37. 37.149 × 4 =
  38. 38.63 × 8 =
  39. 39.37 × 8 =
  40. 40.20 × 4 =

Answer key

  1. 296
  2. 260
  3. 472
  4. 544
  5. 248
  6. 200
  7. 456
  8. 576
  9. 160
  10. 216
  11. 476
  12. 196
  13. 264
  14. 412
  15. 456
  16. 500
  17. 160
  18. 192
  19. 508
  20. 224
  21. 128
  22. 504
  23. 252
  24. 108
  25. 92
  26. 304
  27. 116
  28. 608
  29. 380
  30. 112
  31. 216
  32. 448
  33. 628
  34. 376
  35. 196
  36. 396
  37. 596
  38. 504
  39. 296
  40. 80

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