← 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 341 · 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. 1.28 × 8 =
  2. 2.17 × 8 =
  3. 3.23 × 4 =
  4. 4.13 × 4 =
  5. 5.40 × 8 =
  6. 6.22 × 8 =
  7. 7.42 × 4 =
  8. 8.26 × 8 =
  9. 9.31 × 4 =
  10. 10.46 × 4 =
  11. 11.27 × 8 =
  12. 12.15 × 8 =
  13. 13.18 × 8 =
  14. 14.25 × 8 =
  15. 15.30 × 8 =
  16. 16.21 × 8 =
  17. 17.12 × 4 =
  18. 18.17 × 4 =
  19. 19.56 × 4 =
  20. 20.24 × 8 =
  21. 21.21 × 4 =
  22. 22.35 × 4 =
  23. 23.63 × 4 =
  24. 24.33 × 8 =
  25. 25.19 × 8 =
  26. 26.48 × 4 =
  27. 27.32 × 8 =
  28. 28.55 × 4 =
  29. 29.16 × 8 =
  30. 30.43 × 4 =
  31. 31.39 × 8 =
  32. 32.14 × 8 =
  33. 33.31 × 8 =
  34. 34.58 × 4 =
  35. 35.23 × 8 =
  36. 36.51 × 4 =
  37. 37.18 × 4 =
  38. 38.52 × 4 =
  39. 39.27 × 4 =
  40. 40.20 × 4 =

Answer key

  1. 224
  2. 136
  3. 92
  4. 52
  5. 320
  6. 176
  7. 168
  8. 208
  9. 124
  10. 184
  11. 216
  12. 120
  13. 144
  14. 200
  15. 240
  16. 168
  17. 48
  18. 68
  19. 224
  20. 192
  21. 84
  22. 140
  23. 252
  24. 264
  25. 152
  26. 192
  27. 256
  28. 220
  29. 128
  30. 172
  31. 312
  32. 112
  33. 248
  34. 232
  35. 184
  36. 204
  37. 72
  38. 208
  39. 108
  40. 80

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