← 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 13 · 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. 1.16 × 4 =
  2. 2.39 × 8 =
  3. 3.12 × 8 =
  4. 4.40 × 8 =
  5. 5.34 × 8 =
  6. 6.13 × 4 =
  7. 7.31 × 4 =
  8. 8.59 × 4 =
  9. 9.73 × 4 =
  10. 10.27 × 4 =
  11. 11.16 × 8 =
  12. 12.74 × 4 =
  13. 13.75 × 4 =
  14. 14.33 × 4 =
  15. 15.47 × 4 =
  16. 16.32 × 8 =
  17. 17.35 × 4 =
  18. 18.54 × 4 =
  19. 19.19 × 8 =
  20. 20.41 × 4 =
  21. 21.49 × 4 =
  22. 22.18 × 8 =
  23. 23.20 × 4 =
  24. 24.28 × 8 =
  25. 25.36 × 8 =
  26. 26.64 × 4 =
  27. 27.69 × 4 =
  28. 28.17 × 4 =
  29. 29.21 × 4 =
  30. 30.22 × 4 =
  31. 31.53 × 4 =
  32. 32.67 × 4 =
  33. 33.25 × 8 =
  34. 34.72 × 4 =
  35. 35.20 × 8 =
  36. 36.48 × 4 =
  37. 37.21 × 8 =
  38. 38.35 × 8 =
  39. 39.29 × 8 =
  40. 40.63 × 4 =

Answer key

  1. 64
  2. 312
  3. 96
  4. 320
  5. 272
  6. 52
  7. 124
  8. 236
  9. 292
  10. 108
  11. 128
  12. 296
  13. 300
  14. 132
  15. 188
  16. 256
  17. 140
  18. 216
  19. 152
  20. 164
  21. 196
  22. 144
  23. 80
  24. 224
  25. 288
  26. 256
  27. 276
  28. 68
  29. 84
  30. 88
  31. 212
  32. 268
  33. 200
  34. 288
  35. 160
  36. 192
  37. 168
  38. 280
  39. 232
  40. 252

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