← 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 686 · 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. 1.13 × 8 =
  2. 2.29 × 4 =
  3. 3.28 × 8 =
  4. 4.35 × 8 =
  5. 5.19 × 8 =
  6. 6.68 × 4 =
  7. 7.16 × 4 =
  8. 8.18 × 8 =
  9. 9.36 × 8 =
  10. 10.69 × 4 =
  11. 11.28 × 4 =
  12. 12.23 × 8 =
  13. 13.17 × 8 =
  14. 14.32 × 4 =
  15. 15.35 × 4 =
  16. 16.47 × 4 =
  17. 17.19 × 4 =
  18. 18.40 × 8 =
  19. 19.41 × 4 =
  20. 20.58 × 4 =
  21. 21.38 × 4 =
  22. 22.23 × 4 =
  23. 23.39 × 8 =
  24. 24.22 × 4 =
  25. 25.37 × 8 =
  26. 26.49 × 4 =
  27. 27.64 × 4 =
  28. 28.53 × 4 =
  29. 29.25 × 8 =
  30. 30.31 × 8 =
  31. 31.20 × 4 =
  32. 32.26 × 8 =
  33. 33.18 × 4 =
  34. 34.36 × 4 =
  35. 35.12 × 4 =
  36. 36.34 × 8 =
  37. 37.37 × 4 =
  38. 38.38 × 8 =
  39. 39.66 × 4 =
  40. 40.39 × 4 =

Answer key

  1. 104
  2. 116
  3. 224
  4. 280
  5. 152
  6. 272
  7. 64
  8. 144
  9. 288
  10. 276
  11. 112
  12. 184
  13. 136
  14. 128
  15. 140
  16. 188
  17. 76
  18. 320
  19. 164
  20. 232
  21. 152
  22. 92
  23. 312
  24. 88
  25. 296
  26. 196
  27. 256
  28. 212
  29. 200
  30. 248
  31. 80
  32. 208
  33. 72
  34. 144
  35. 48
  36. 272
  37. 148
  38. 304
  39. 264
  40. 156

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