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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 95 · 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. 1.55 × 4 =
  2. 2.13 × 4 =
  3. 3.28 × 8 =
  4. 4.52 × 4 =
  5. 5.52 × 8 =
  6. 6.44 × 4 =
  7. 7.145 × 4 =
  8. 8.85 × 4 =
  9. 9.52 × 4 =
  10. 10.142 × 4 =
  11. 11.156 × 4 =
  12. 12.75 × 8 =
  13. 13.39 × 8 =
  14. 14.16 × 8 =
  15. 15.73 × 8 =
  16. 16.128 × 4 =
  17. 17.46 × 8 =
  18. 18.66 × 4 =
  19. 19.117 × 4 =
  20. 20.56 × 4 =
  21. 21.40 × 8 =
  22. 22.106 × 4 =
  23. 23.88 × 4 =
  24. 24.54 × 8 =
  25. 25.25 × 8 =
  26. 26.130 × 4 =
  27. 27.60 × 8 =
  28. 28.73 × 8 =
  29. 29.21 × 8 =
  30. 30.141 × 4 =
  31. 31.25 × 4 =
  32. 32.49 × 8 =
  33. 33.44 × 4 =
  34. 34.58 × 4 =
  35. 35.15 × 8 =
  36. 36.38 × 8 =
  37. 37.110 × 4 =
  38. 38.19 × 8 =
  39. 39.72 × 4 =
  40. 40.66 × 4 =

Answer key

  1. 220
  2. 52
  3. 224
  4. 208
  5. 416
  6. 176
  7. 580
  8. 340
  9. 208
  10. 568
  11. 624
  12. 600
  13. 312
  14. 128
  15. 584
  16. 512
  17. 368
  18. 264
  19. 468
  20. 224
  21. 320
  22. 424
  23. 352
  24. 432
  25. 200
  26. 520
  27. 480
  28. 584
  29. 168
  30. 564
  31. 100
  32. 392
  33. 176
  34. 232
  35. 120
  36. 304
  37. 440
  38. 152
  39. 288
  40. 264

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