← 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 285 · 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. 1.17 × 8 =
  2. 2.32 × 8 =
  3. 3.31 × 8 =
  4. 4.27 × 8 =
  5. 5.39 × 8 =
  6. 6.69 × 4 =
  7. 7.55 × 4 =
  8. 8.33 × 8 =
  9. 9.15 × 8 =
  10. 10.50 × 4 =
  11. 11.62 × 4 =
  12. 12.31 × 4 =
  13. 13.13 × 8 =
  14. 14.21 × 8 =
  15. 15.52 × 4 =
  16. 16.15 × 4 =
  17. 17.19 × 4 =
  18. 18.14 × 8 =
  19. 19.38 × 8 =
  20. 20.14 × 4 =
  21. 21.28 × 8 =
  22. 22.12 × 8 =
  23. 23.73 × 4 =
  24. 24.18 × 8 =
  25. 25.57 × 4 =
  26. 26.40 × 8 =
  27. 27.48 × 4 =
  28. 28.35 × 8 =
  29. 29.40 × 4 =
  30. 30.75 × 4 =
  31. 31.37 × 4 =
  32. 32.23 × 4 =
  33. 33.56 × 4 =
  34. 34.24 × 8 =
  35. 35.29 × 8 =
  36. 36.20 × 8 =
  37. 37.26 × 8 =
  38. 38.27 × 4 =
  39. 39.61 × 4 =
  40. 40.21 × 4 =

Answer key

  1. 136
  2. 256
  3. 248
  4. 216
  5. 312
  6. 276
  7. 220
  8. 264
  9. 120
  10. 200
  11. 248
  12. 124
  13. 104
  14. 168
  15. 208
  16. 60
  17. 76
  18. 112
  19. 304
  20. 56
  21. 224
  22. 96
  23. 292
  24. 144
  25. 228
  26. 320
  27. 192
  28. 280
  29. 160
  30. 300
  31. 148
  32. 92
  33. 224
  34. 192
  35. 232
  36. 160
  37. 208
  38. 108
  39. 244
  40. 84

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