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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 852 · 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. 1.41 × 4 =
  2. 2.38 × 8 =
  3. 3.23 × 8 =
  4. 4.18 × 4 =
  5. 5.32 × 8 =
  6. 6.56 × 4 =
  7. 7.22 × 8 =
  8. 8.68 × 4 =
  9. 9.102 × 4 =
  10. 10.43 × 4 =
  11. 11.52 × 8 =
  12. 12.72 × 8 =
  13. 13.68 × 8 =
  14. 14.74 × 8 =
  15. 15.18 × 8 =
  16. 16.17 × 8 =
  17. 17.61 × 4 =
  18. 18.12 × 8 =
  19. 19.34 × 8 =
  20. 20.42 × 8 =
  21. 21.63 × 8 =
  22. 22.33 × 8 =
  23. 23.139 × 4 =
  24. 24.59 × 4 =
  25. 25.20 × 4 =
  26. 26.105 × 4 =
  27. 27.117 × 4 =
  28. 28.54 × 4 =
  29. 29.30 × 8 =
  30. 30.37 × 4 =
  31. 31.112 × 4 =
  32. 32.98 × 4 =
  33. 33.59 × 4 =
  34. 34.51 × 8 =
  35. 35.62 × 4 =
  36. 36.45 × 8 =
  37. 37.19 × 4 =
  38. 38.135 × 4 =
  39. 39.57 × 4 =
  40. 40.26 × 8 =

Answer key

  1. 164
  2. 304
  3. 184
  4. 72
  5. 256
  6. 224
  7. 176
  8. 272
  9. 408
  10. 172
  11. 416
  12. 576
  13. 544
  14. 592
  15. 144
  16. 136
  17. 244
  18. 96
  19. 272
  20. 336
  21. 504
  22. 264
  23. 556
  24. 236
  25. 80
  26. 420
  27. 468
  28. 216
  29. 240
  30. 148
  31. 448
  32. 392
  33. 236
  34. 408
  35. 248
  36. 360
  37. 76
  38. 540
  39. 228
  40. 208

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