← 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 834 · 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. 1.18 × 8 =
  2. 2.36 × 8 =
  3. 3.29 × 4 =
  4. 4.13 × 4 =
  5. 5.54 × 4 =
  6. 6.39 × 8 =
  7. 7.20 × 4 =
  8. 8.37 × 4 =
  9. 9.33 × 8 =
  10. 10.40 × 8 =
  11. 11.35 × 8 =
  12. 12.25 × 4 =
  13. 13.16 × 8 =
  14. 14.30 × 8 =
  15. 15.49 × 4 =
  16. 16.58 × 4 =
  17. 17.30 × 4 =
  18. 18.16 × 4 =
  19. 19.27 × 4 =
  20. 20.69 × 4 =
  21. 21.13 × 8 =
  22. 22.64 × 4 =
  23. 23.22 × 8 =
  24. 24.35 × 4 =
  25. 25.37 × 8 =
  26. 26.12 × 8 =
  27. 27.38 × 8 =
  28. 28.38 × 4 =
  29. 29.48 × 4 =
  30. 30.70 × 4 =
  31. 31.17 × 8 =
  32. 32.32 × 4 =
  33. 33.15 × 8 =
  34. 34.27 × 8 =
  35. 35.53 × 4 =
  36. 36.26 × 4 =
  37. 37.21 × 8 =
  38. 38.26 × 8 =
  39. 39.66 × 4 =
  40. 40.20 × 8 =

Answer key

  1. 144
  2. 288
  3. 116
  4. 52
  5. 216
  6. 312
  7. 80
  8. 148
  9. 264
  10. 320
  11. 280
  12. 100
  13. 128
  14. 240
  15. 196
  16. 232
  17. 120
  18. 64
  19. 108
  20. 276
  21. 104
  22. 256
  23. 176
  24. 140
  25. 296
  26. 96
  27. 304
  28. 152
  29. 192
  30. 280
  31. 136
  32. 128
  33. 120
  34. 216
  35. 212
  36. 104
  37. 168
  38. 208
  39. 264
  40. 160

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