← 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 411 · 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. 1.20 × 4 =
  2. 2.25 × 8 =
  3. 3.51 × 4 =
  4. 4.33 × 8 =
  5. 5.18 × 4 =
  6. 6.57 × 4 =
  7. 7.28 × 4 =
  8. 8.75 × 4 =
  9. 9.22 × 8 =
  10. 10.13 × 8 =
  11. 11.72 × 4 =
  12. 12.69 × 4 =
  13. 13.19 × 8 =
  14. 14.21 × 8 =
  15. 15.23 × 8 =
  16. 16.30 × 8 =
  17. 17.27 × 8 =
  18. 18.12 × 8 =
  19. 19.26 × 8 =
  20. 20.49 × 4 =
  21. 21.19 × 4 =
  22. 22.17 × 8 =
  23. 23.39 × 4 =
  24. 24.67 × 4 =
  25. 25.14 × 8 =
  26. 26.40 × 8 =
  27. 27.41 × 4 =
  28. 28.14 × 4 =
  29. 29.28 × 8 =
  30. 30.58 × 4 =
  31. 31.70 × 4 =
  32. 32.39 × 8 =
  33. 33.16 × 4 =
  34. 34.42 × 4 =
  35. 35.44 × 4 =
  36. 36.12 × 4 =
  37. 37.22 × 4 =
  38. 38.50 × 4 =
  39. 39.30 × 4 =
  40. 40.23 × 4 =

Answer key

  1. 80
  2. 200
  3. 204
  4. 264
  5. 72
  6. 228
  7. 112
  8. 300
  9. 176
  10. 104
  11. 288
  12. 276
  13. 152
  14. 168
  15. 184
  16. 240
  17. 216
  18. 96
  19. 208
  20. 196
  21. 76
  22. 136
  23. 156
  24. 268
  25. 112
  26. 320
  27. 164
  28. 56
  29. 224
  30. 232
  31. 280
  32. 312
  33. 64
  34. 168
  35. 176
  36. 48
  37. 88
  38. 200
  39. 120
  40. 92

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