← 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 409 · 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. 1.27 × 8 =
  2. 2.37 × 8 =
  3. 3.16 × 8 =
  4. 4.41 × 4 =
  5. 5.26 × 8 =
  6. 6.69 × 4 =
  7. 7.24 × 4 =
  8. 8.18 × 8 =
  9. 9.36 × 4 =
  10. 10.57 × 4 =
  11. 11.20 × 8 =
  12. 12.35 × 8 =
  13. 13.13 × 8 =
  14. 14.32 × 4 =
  15. 15.28 × 8 =
  16. 16.64 × 4 =
  17. 17.25 × 4 =
  18. 18.40 × 4 =
  19. 19.30 × 8 =
  20. 20.44 × 4 =
  21. 21.34 × 4 =
  22. 22.15 × 8 =
  23. 23.22 × 4 =
  24. 24.70 × 4 =
  25. 25.40 × 8 =
  26. 26.46 × 4 =
  27. 27.24 × 8 =
  28. 28.63 × 4 =
  29. 29.75 × 4 =
  30. 30.14 × 4 =
  31. 31.16 × 4 =
  32. 32.36 × 8 =
  33. 33.25 × 8 =
  34. 34.21 × 8 =
  35. 35.59 × 4 =
  36. 36.55 × 4 =
  37. 37.12 × 8 =
  38. 38.21 × 4 =
  39. 39.17 × 8 =
  40. 40.53 × 4 =

Answer key

  1. 216
  2. 296
  3. 128
  4. 164
  5. 208
  6. 276
  7. 96
  8. 144
  9. 144
  10. 228
  11. 160
  12. 280
  13. 104
  14. 128
  15. 224
  16. 256
  17. 100
  18. 160
  19. 240
  20. 176
  21. 136
  22. 120
  23. 88
  24. 280
  25. 320
  26. 184
  27. 192
  28. 252
  29. 300
  30. 56
  31. 64
  32. 288
  33. 200
  34. 168
  35. 236
  36. 220
  37. 96
  38. 84
  39. 136
  40. 212

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