← 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 357 · 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. 1.69 × 4 =
  2. 2.30 × 8 =
  3. 3.37 × 4 =
  4. 4.13 × 4 =
  5. 5.28 × 8 =
  6. 6.49 × 4 =
  7. 7.26 × 4 =
  8. 8.31 × 8 =
  9. 9.39 × 8 =
  10. 10.13 × 8 =
  11. 11.19 × 8 =
  12. 12.65 × 4 =
  13. 13.27 × 4 =
  14. 14.20 × 8 =
  15. 15.14 × 8 =
  16. 16.53 × 4 =
  17. 17.17 × 4 =
  18. 18.48 × 4 =
  19. 19.33 × 4 =
  20. 20.31 × 4 =
  21. 21.50 × 4 =
  22. 22.36 × 8 =
  23. 23.32 × 4 =
  24. 24.56 × 4 =
  25. 25.28 × 4 =
  26. 26.41 × 4 =
  27. 27.29 × 4 =
  28. 28.12 × 8 =
  29. 29.57 × 4 =
  30. 30.74 × 4 =
  31. 31.63 × 4 =
  32. 32.22 × 4 =
  33. 33.44 × 4 =
  34. 34.38 × 4 =
  35. 35.32 × 8 =
  36. 36.70 × 4 =
  37. 37.24 × 8 =
  38. 38.24 × 4 =
  39. 39.45 × 4 =
  40. 40.23 × 8 =

Answer key

  1. 276
  2. 240
  3. 148
  4. 52
  5. 224
  6. 196
  7. 104
  8. 248
  9. 312
  10. 104
  11. 152
  12. 260
  13. 108
  14. 160
  15. 112
  16. 212
  17. 68
  18. 192
  19. 132
  20. 124
  21. 200
  22. 288
  23. 128
  24. 224
  25. 112
  26. 164
  27. 116
  28. 96
  29. 228
  30. 296
  31. 252
  32. 88
  33. 176
  34. 152
  35. 256
  36. 280
  37. 192
  38. 96
  39. 180
  40. 184

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