← 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 381 · 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. 1.25 × 4 =
  2. 2.68 × 4 =
  3. 3.62 × 4 =
  4. 4.45 × 4 =
  5. 5.20 × 4 =
  6. 6.73 × 4 =
  7. 7.17 × 8 =
  8. 8.30 × 8 =
  9. 9.19 × 4 =
  10. 10.34 × 8 =
  11. 11.47 × 4 =
  12. 12.19 × 8 =
  13. 13.14 × 8 =
  14. 14.75 × 4 =
  15. 15.16 × 4 =
  16. 16.27 × 4 =
  17. 17.16 × 8 =
  18. 18.15 × 8 =
  19. 19.63 × 4 =
  20. 20.17 × 4 =
  21. 21.23 × 8 =
  22. 22.25 × 8 =
  23. 23.67 × 4 =
  24. 24.24 × 4 =
  25. 25.26 × 4 =
  26. 26.23 × 4 =
  27. 27.65 × 4 =
  28. 28.41 × 4 =
  29. 29.12 × 4 =
  30. 30.21 × 8 =
  31. 31.58 × 4 =
  32. 32.36 × 8 =
  33. 33.26 × 8 =
  34. 34.28 × 8 =
  35. 35.74 × 4 =
  36. 36.15 × 4 =
  37. 37.39 × 8 =
  38. 38.31 × 8 =
  39. 39.40 × 8 =
  40. 40.44 × 4 =

Answer key

  1. 100
  2. 272
  3. 248
  4. 180
  5. 80
  6. 292
  7. 136
  8. 240
  9. 76
  10. 272
  11. 188
  12. 152
  13. 112
  14. 300
  15. 64
  16. 108
  17. 128
  18. 120
  19. 252
  20. 68
  21. 184
  22. 200
  23. 268
  24. 96
  25. 104
  26. 92
  27. 260
  28. 164
  29. 48
  30. 168
  31. 232
  32. 288
  33. 208
  34. 224
  35. 296
  36. 60
  37. 312
  38. 248
  39. 320
  40. 176

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