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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 367 · 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. 1.20 × 8 =
  2. 2.124 × 4 =
  3. 3.23 × 8 =
  4. 4.31 × 8 =
  5. 5.113 × 4 =
  6. 6.140 × 4 =
  7. 7.28 × 4 =
  8. 8.16 × 4 =
  9. 9.42 × 4 =
  10. 10.68 × 4 =
  11. 11.46 × 4 =
  12. 12.64 × 8 =
  13. 13.27 × 4 =
  14. 14.97 × 4 =
  15. 15.84 × 4 =
  16. 16.83 × 4 =
  17. 17.92 × 4 =
  18. 18.33 × 8 =
  19. 19.145 × 4 =
  20. 20.129 × 4 =
  21. 21.106 × 4 =
  22. 22.74 × 4 =
  23. 23.61 × 8 =
  24. 24.65 × 8 =
  25. 25.58 × 8 =
  26. 26.130 × 4 =
  27. 27.158 × 4 =
  28. 28.73 × 8 =
  29. 29.62 × 4 =
  30. 30.39 × 8 =
  31. 31.58 × 8 =
  32. 32.64 × 8 =
  33. 33.153 × 4 =
  34. 34.56 × 4 =
  35. 35.33 × 8 =
  36. 36.35 × 8 =
  37. 37.45 × 8 =
  38. 38.69 × 8 =
  39. 39.94 × 4 =
  40. 40.33 × 8 =

Answer key

  1. 160
  2. 496
  3. 184
  4. 248
  5. 452
  6. 560
  7. 112
  8. 64
  9. 168
  10. 272
  11. 184
  12. 512
  13. 108
  14. 388
  15. 336
  16. 332
  17. 368
  18. 264
  19. 580
  20. 516
  21. 424
  22. 296
  23. 488
  24. 520
  25. 464
  26. 520
  27. 632
  28. 584
  29. 248
  30. 312
  31. 464
  32. 512
  33. 612
  34. 224
  35. 264
  36. 280
  37. 360
  38. 552
  39. 376
  40. 264

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