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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 120 · 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. 1.140 × 4 =
  2. 2.49 × 4 =
  3. 3.61 × 4 =
  4. 4.17 × 4 =
  5. 5.64 × 4 =
  6. 6.34 × 4 =
  7. 7.124 × 4 =
  8. 8.44 × 4 =
  9. 9.149 × 4 =
  10. 10.154 × 4 =
  11. 11.135 × 4 =
  12. 12.13 × 4 =
  13. 13.56 × 8 =
  14. 14.67 × 4 =
  15. 15.155 × 4 =
  16. 16.133 × 4 =
  17. 17.136 × 4 =
  18. 18.63 × 4 =
  19. 19.20 × 4 =
  20. 20.40 × 4 =
  21. 21.62 × 4 =
  22. 22.29 × 8 =
  23. 23.27 × 8 =
  24. 24.16 × 4 =
  25. 25.18 × 8 =
  26. 26.35 × 8 =
  27. 27.14 × 8 =
  28. 28.47 × 4 =
  29. 29.28 × 8 =
  30. 30.21 × 8 =
  31. 31.52 × 4 =
  32. 32.68 × 4 =
  33. 33.54 × 8 =
  34. 34.133 × 4 =
  35. 35.22 × 8 =
  36. 36.34 × 8 =
  37. 37.48 × 4 =
  38. 38.118 × 4 =
  39. 39.66 × 8 =
  40. 40.112 × 4 =

Answer key

  1. 560
  2. 196
  3. 244
  4. 68
  5. 256
  6. 136
  7. 496
  8. 176
  9. 596
  10. 616
  11. 540
  12. 52
  13. 448
  14. 268
  15. 620
  16. 532
  17. 544
  18. 252
  19. 80
  20. 160
  21. 248
  22. 232
  23. 216
  24. 64
  25. 144
  26. 280
  27. 112
  28. 188
  29. 224
  30. 168
  31. 208
  32. 272
  33. 432
  34. 532
  35. 176
  36. 272
  37. 192
  38. 472
  39. 528
  40. 448

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