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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 779 · 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. 1.25 × 8 =
  2. 2.21 × 8 =
  3. 3.120 × 4 =
  4. 4.27 × 8 =
  5. 5.30 × 8 =
  6. 6.129 × 4 =
  7. 7.19 × 4 =
  8. 8.49 × 4 =
  9. 9.122 × 4 =
  10. 10.61 × 4 =
  11. 11.97 × 4 =
  12. 12.31 × 8 =
  13. 13.55 × 8 =
  14. 14.158 × 4 =
  15. 15.43 × 8 =
  16. 16.40 × 8 =
  17. 17.93 × 4 =
  18. 18.13 × 8 =
  19. 19.38 × 8 =
  20. 20.13 × 4 =
  21. 21.29 × 4 =
  22. 22.88 × 4 =
  23. 23.50 × 8 =
  24. 24.16 × 4 =
  25. 25.60 × 4 =
  26. 26.52 × 4 =
  27. 27.57 × 8 =
  28. 28.44 × 8 =
  29. 29.132 × 4 =
  30. 30.81 × 4 =
  31. 31.107 × 4 =
  32. 32.27 × 8 =
  33. 33.58 × 8 =
  34. 34.34 × 8 =
  35. 35.14 × 8 =
  36. 36.74 × 4 =
  37. 37.76 × 4 =
  38. 38.116 × 4 =
  39. 39.65 × 4 =
  40. 40.16 × 8 =

Answer key

  1. 200
  2. 168
  3. 480
  4. 216
  5. 240
  6. 516
  7. 76
  8. 196
  9. 488
  10. 244
  11. 388
  12. 248
  13. 440
  14. 632
  15. 344
  16. 320
  17. 372
  18. 104
  19. 304
  20. 52
  21. 116
  22. 352
  23. 400
  24. 64
  25. 240
  26. 208
  27. 456
  28. 352
  29. 528
  30. 324
  31. 428
  32. 216
  33. 464
  34. 272
  35. 112
  36. 296
  37. 304
  38. 464
  39. 260
  40. 128

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