← Multiply by 4 and 8 by doubling lesson New set →

Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 855 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.63 × 4 =
  2. 2.33 × 8 =
  3. 3.26 × 4 =
  4. 4.38 × 8 =
  5. 5.31 × 8 =
  6. 6.27 × 4 =
  7. 7.16 × 8 =
  8. 8.22 × 4 =
  9. 9.17 × 8 =
  10. 10.19 × 8 =
  11. 11.70 × 4 =
  12. 12.29 × 8 =
  13. 13.26 × 8 =
  14. 14.16 × 4 =
  15. 15.15 × 8 =
  16. 16.34 × 8 =
  17. 17.15 × 4 =
  18. 18.30 × 4 =
  19. 19.64 × 4 =
  20. 20.32 × 8 =
  21. 21.49 × 4 =
  22. 22.51 × 4 =
  23. 23.46 × 4 =
  24. 24.56 × 4 =
  25. 25.28 × 8 =
  26. 26.12 × 8 =
  27. 27.13 × 4 =
  28. 28.57 × 4 =
  29. 29.52 × 4 =
  30. 30.36 × 8 =
  31. 31.23 × 8 =
  32. 32.22 × 8 =
  33. 33.21 × 4 =
  34. 34.50 × 4 =
  35. 35.32 × 4 =
  36. 36.40 × 8 =
  37. 37.25 × 8 =
  38. 38.28 × 4 =
  39. 39.73 × 4 =
  40. 40.53 × 4 =

Answer key

  1. 252
  2. 264
  3. 104
  4. 304
  5. 248
  6. 108
  7. 128
  8. 88
  9. 136
  10. 152
  11. 280
  12. 232
  13. 208
  14. 64
  15. 120
  16. 272
  17. 60
  18. 120
  19. 256
  20. 256
  21. 196
  22. 204
  23. 184
  24. 224
  25. 224
  26. 96
  27. 52
  28. 228
  29. 208
  30. 288
  31. 184
  32. 176
  33. 84
  34. 200
  35. 128
  36. 320
  37. 200
  38. 112
  39. 292
  40. 212

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