← 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 793 · 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. 1.34 × 4 =
  2. 2.40 × 8 =
  3. 3.57 × 4 =
  4. 4.28 × 8 =
  5. 5.21 × 8 =
  6. 6.64 × 4 =
  7. 7.37 × 8 =
  8. 8.16 × 8 =
  9. 9.73 × 4 =
  10. 10.27 × 8 =
  11. 11.34 × 8 =
  12. 12.32 × 8 =
  13. 13.14 × 8 =
  14. 14.29 × 8 =
  15. 15.27 × 4 =
  16. 16.36 × 8 =
  17. 17.48 × 4 =
  18. 18.47 × 4 =
  19. 19.13 × 8 =
  20. 20.52 × 4 =
  21. 21.71 × 4 =
  22. 22.35 × 4 =
  23. 23.14 × 4 =
  24. 24.39 × 4 =
  25. 25.37 × 4 =
  26. 26.18 × 8 =
  27. 27.50 × 4 =
  28. 28.23 × 8 =
  29. 29.58 × 4 =
  30. 30.26 × 8 =
  31. 31.25 × 8 =
  32. 32.24 × 8 =
  33. 33.15 × 8 =
  34. 34.35 × 8 =
  35. 35.39 × 8 =
  36. 36.26 × 4 =
  37. 37.31 × 4 =
  38. 38.25 × 4 =
  39. 39.51 × 4 =
  40. 40.19 × 8 =

Answer key

  1. 136
  2. 320
  3. 228
  4. 224
  5. 168
  6. 256
  7. 296
  8. 128
  9. 292
  10. 216
  11. 272
  12. 256
  13. 112
  14. 232
  15. 108
  16. 288
  17. 192
  18. 188
  19. 104
  20. 208
  21. 284
  22. 140
  23. 56
  24. 156
  25. 148
  26. 144
  27. 200
  28. 184
  29. 232
  30. 208
  31. 200
  32. 192
  33. 120
  34. 280
  35. 312
  36. 104
  37. 124
  38. 100
  39. 204
  40. 152

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