← 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 337 · 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. 2.35 × 8 =
  3. 3.18 × 8 =
  4. 4.21 × 4 =
  5. 5.37 × 4 =
  6. 6.50 × 4 =
  7. 7.57 × 4 =
  8. 8.23 × 4 =
  9. 9.28 × 4 =
  10. 10.21 × 8 =
  11. 11.25 × 4 =
  12. 12.42 × 4 =
  13. 13.24 × 4 =
  14. 14.61 × 4 =
  15. 15.30 × 4 =
  16. 16.59 × 4 =
  17. 17.35 × 4 =
  18. 18.17 × 8 =
  19. 19.15 × 8 =
  20. 20.17 × 4 =
  21. 21.25 × 8 =
  22. 22.39 × 4 =
  23. 23.33 × 4 =
  24. 24.20 × 8 =
  25. 25.19 × 8 =
  26. 26.70 × 4 =
  27. 27.34 × 8 =
  28. 28.69 × 4 =
  29. 29.65 × 4 =
  30. 30.75 × 4 =
  31. 31.16 × 8 =
  32. 32.32 × 8 =
  33. 33.68 × 4 =
  34. 34.12 × 8 =
  35. 35.27 × 4 =
  36. 36.74 × 4 =
  37. 37.41 × 4 =
  38. 38.28 × 8 =
  39. 39.27 × 8 =
  40. 40.26 × 8 =

Answer key

  1. 296
  2. 280
  3. 144
  4. 84
  5. 148
  6. 200
  7. 228
  8. 92
  9. 112
  10. 168
  11. 100
  12. 168
  13. 96
  14. 244
  15. 120
  16. 236
  17. 140
  18. 136
  19. 120
  20. 68
  21. 200
  22. 156
  23. 132
  24. 160
  25. 152
  26. 280
  27. 272
  28. 276
  29. 260
  30. 300
  31. 128
  32. 256
  33. 272
  34. 96
  35. 108
  36. 296
  37. 164
  38. 224
  39. 216
  40. 208

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