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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 850 · 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. 1.85 × 4 =
  2. 2.66 × 8 =
  3. 3.90 × 4 =
  4. 4.68 × 8 =
  5. 5.15 × 8 =
  6. 6.29 × 8 =
  7. 7.29 × 8 =
  8. 8.116 × 4 =
  9. 9.56 × 4 =
  10. 10.37 × 4 =
  11. 11.40 × 4 =
  12. 12.30 × 4 =
  13. 13.135 × 4 =
  14. 14.92 × 4 =
  15. 15.64 × 8 =
  16. 16.16 × 8 =
  17. 17.27 × 4 =
  18. 18.112 × 4 =
  19. 19.17 × 4 =
  20. 20.20 × 8 =
  21. 21.100 × 4 =
  22. 22.76 × 4 =
  23. 23.66 × 8 =
  24. 24.72 × 8 =
  25. 25.40 × 8 =
  26. 26.160 × 4 =
  27. 27.150 × 4 =
  28. 28.45 × 8 =
  29. 29.17 × 4 =
  30. 30.51 × 8 =
  31. 31.66 × 4 =
  32. 32.22 × 8 =
  33. 33.72 × 8 =
  34. 34.36 × 8 =
  35. 35.32 × 8 =
  36. 36.15 × 4 =
  37. 37.54 × 8 =
  38. 38.111 × 4 =
  39. 39.20 × 8 =
  40. 40.44 × 4 =

Answer key

  1. 340
  2. 528
  3. 360
  4. 544
  5. 120
  6. 232
  7. 232
  8. 464
  9. 224
  10. 148
  11. 160
  12. 120
  13. 540
  14. 368
  15. 512
  16. 128
  17. 108
  18. 448
  19. 68
  20. 160
  21. 400
  22. 304
  23. 528
  24. 576
  25. 320
  26. 640
  27. 600
  28. 360
  29. 68
  30. 408
  31. 264
  32. 176
  33. 576
  34. 288
  35. 256
  36. 60
  37. 432
  38. 444
  39. 160
  40. 176

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