← Doubling sprints: × 4 and × 8 lesson New set →

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 281 · 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. 1.18 × 4 =
  2. 2.64 × 8 =
  3. 3.20 × 8 =
  4. 4.49 × 4 =
  5. 5.50 × 8 =
  6. 6.35 × 8 =
  7. 7.158 × 4 =
  8. 8.141 × 4 =
  9. 9.70 × 8 =
  10. 10.152 × 4 =
  11. 11.69 × 8 =
  12. 12.47 × 4 =
  13. 13.33 × 8 =
  14. 14.33 × 4 =
  15. 15.63 × 8 =
  16. 16.42 × 8 =
  17. 17.155 × 4 =
  18. 18.28 × 8 =
  19. 19.58 × 8 =
  20. 20.63 × 4 =
  21. 21.17 × 4 =
  22. 22.42 × 4 =
  23. 23.104 × 4 =
  24. 24.55 × 8 =
  25. 25.102 × 4 =
  26. 26.39 × 8 =
  27. 27.26 × 8 =
  28. 28.12 × 8 =
  29. 29.17 × 8 =
  30. 30.74 × 8 =
  31. 31.64 × 8 =
  32. 32.106 × 4 =
  33. 33.25 × 8 =
  34. 34.54 × 8 =
  35. 35.65 × 8 =
  36. 36.33 × 8 =
  37. 37.62 × 8 =
  38. 38.82 × 4 =
  39. 39.32 × 4 =
  40. 40.116 × 4 =

Answer key

  1. 72
  2. 512
  3. 160
  4. 196
  5. 400
  6. 280
  7. 632
  8. 564
  9. 560
  10. 608
  11. 552
  12. 188
  13. 264
  14. 132
  15. 504
  16. 336
  17. 620
  18. 224
  19. 464
  20. 252
  21. 68
  22. 168
  23. 416
  24. 440
  25. 408
  26. 312
  27. 208
  28. 96
  29. 136
  30. 592
  31. 512
  32. 424
  33. 200
  34. 432
  35. 520
  36. 264
  37. 496
  38. 328
  39. 128
  40. 464

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths