← 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 981 · 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. 1.45 × 4 =
  2. 2.32 × 8 =
  3. 3.16 × 4 =
  4. 4.40 × 8 =
  5. 5.51 × 4 =
  6. 6.52 × 4 =
  7. 7.35 × 4 =
  8. 8.26 × 4 =
  9. 9.21 × 8 =
  10. 10.21 × 4 =
  11. 11.18 × 8 =
  12. 12.75 × 4 =
  13. 13.38 × 4 =
  14. 14.30 × 8 =
  15. 15.37 × 4 =
  16. 16.68 × 4 =
  17. 17.57 × 4 =
  18. 18.38 × 8 =
  19. 19.19 × 4 =
  20. 20.74 × 4 =
  21. 21.64 × 4 =
  22. 22.31 × 4 =
  23. 23.48 × 4 =
  24. 24.56 × 4 =
  25. 25.59 × 4 =
  26. 26.72 × 4 =
  27. 27.70 × 4 =
  28. 28.37 × 8 =
  29. 29.44 × 4 =
  30. 30.15 × 8 =
  31. 31.36 × 4 =
  32. 32.27 × 8 =
  33. 33.14 × 8 =
  34. 34.12 × 8 =
  35. 35.36 × 8 =
  36. 36.31 × 8 =
  37. 37.19 × 8 =
  38. 38.25 × 4 =
  39. 39.24 × 4 =
  40. 40.20 × 4 =

Answer key

  1. 180
  2. 256
  3. 64
  4. 320
  5. 204
  6. 208
  7. 140
  8. 104
  9. 168
  10. 84
  11. 144
  12. 300
  13. 152
  14. 240
  15. 148
  16. 272
  17. 228
  18. 304
  19. 76
  20. 296
  21. 256
  22. 124
  23. 192
  24. 224
  25. 236
  26. 288
  27. 280
  28. 296
  29. 176
  30. 120
  31. 144
  32. 216
  33. 112
  34. 96
  35. 288
  36. 248
  37. 152
  38. 100
  39. 96
  40. 80

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