← 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 764 · 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. 1.37 × 8 =
  2. 2.55 × 4 =
  3. 3.44 × 4 =
  4. 4.74 × 4 =
  5. 5.35 × 8 =
  6. 6.12 × 8 =
  7. 7.15 × 4 =
  8. 8.27 × 8 =
  9. 9.64 × 4 =
  10. 10.50 × 4 =
  11. 11.22 × 4 =
  12. 12.28 × 8 =
  13. 13.38 × 8 =
  14. 14.51 × 4 =
  15. 15.16 × 4 =
  16. 16.13 × 8 =
  17. 17.25 × 4 =
  18. 18.35 × 4 =
  19. 19.30 × 4 =
  20. 20.75 × 4 =
  21. 21.22 × 8 =
  22. 22.60 × 4 =
  23. 23.40 × 8 =
  24. 24.19 × 8 =
  25. 25.27 × 4 =
  26. 26.69 × 4 =
  27. 27.38 × 4 =
  28. 28.65 × 4 =
  29. 29.28 × 4 =
  30. 30.23 × 8 =
  31. 31.34 × 4 =
  32. 32.52 × 4 =
  33. 33.68 × 4 =
  34. 34.30 × 8 =
  35. 35.17 × 8 =
  36. 36.16 × 8 =
  37. 37.59 × 4 =
  38. 38.19 × 4 =
  39. 39.31 × 4 =
  40. 40.62 × 4 =

Answer key

  1. 296
  2. 220
  3. 176
  4. 296
  5. 280
  6. 96
  7. 60
  8. 216
  9. 256
  10. 200
  11. 88
  12. 224
  13. 304
  14. 204
  15. 64
  16. 104
  17. 100
  18. 140
  19. 120
  20. 300
  21. 176
  22. 240
  23. 320
  24. 152
  25. 108
  26. 276
  27. 152
  28. 260
  29. 112
  30. 184
  31. 136
  32. 208
  33. 272
  34. 240
  35. 136
  36. 128
  37. 236
  38. 76
  39. 124
  40. 248

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