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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 878 · 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. 1.14 × 8 =
  2. 2.59 × 8 =
  3. 3.56 × 4 =
  4. 4.15 × 4 =
  5. 5.22 × 4 =
  6. 6.70 × 8 =
  7. 7.55 × 8 =
  8. 8.35 × 4 =
  9. 9.72 × 4 =
  10. 10.55 × 8 =
  11. 11.14 × 4 =
  12. 12.50 × 8 =
  13. 13.75 × 8 =
  14. 14.25 × 8 =
  15. 15.97 × 4 =
  16. 16.129 × 4 =
  17. 17.71 × 4 =
  18. 18.62 × 8 =
  19. 19.113 × 4 =
  20. 20.50 × 8 =
  21. 21.139 × 4 =
  22. 22.14 × 8 =
  23. 23.13 × 4 =
  24. 24.16 × 4 =
  25. 25.127 × 4 =
  26. 26.151 × 4 =
  27. 27.34 × 8 =
  28. 28.64 × 8 =
  29. 29.104 × 4 =
  30. 30.24 × 8 =
  31. 31.45 × 4 =
  32. 32.57 × 8 =
  33. 33.46 × 4 =
  34. 34.109 × 4 =
  35. 35.23 × 8 =
  36. 36.53 × 4 =
  37. 37.99 × 4 =
  38. 38.50 × 8 =
  39. 39.130 × 4 =
  40. 40.78 × 4 =

Answer key

  1. 112
  2. 472
  3. 224
  4. 60
  5. 88
  6. 560
  7. 440
  8. 140
  9. 288
  10. 440
  11. 56
  12. 400
  13. 600
  14. 200
  15. 388
  16. 516
  17. 284
  18. 496
  19. 452
  20. 400
  21. 556
  22. 112
  23. 52
  24. 64
  25. 508
  26. 604
  27. 272
  28. 512
  29. 416
  30. 192
  31. 180
  32. 456
  33. 184
  34. 436
  35. 184
  36. 212
  37. 396
  38. 400
  39. 520
  40. 312

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