← 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 66 · 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. 1.21 × 4 =
  2. 2.37 × 8 =
  3. 3.32 × 4 =
  4. 4.17 × 8 =
  5. 5.60 × 4 =
  6. 6.52 × 4 =
  7. 7.19 × 8 =
  8. 8.15 × 8 =
  9. 9.14 × 4 =
  10. 10.75 × 4 =
  11. 11.74 × 4 =
  12. 12.66 × 4 =
  13. 13.45 × 4 =
  14. 14.18 × 8 =
  15. 15.22 × 4 =
  16. 16.64 × 4 =
  17. 17.13 × 4 =
  18. 18.41 × 4 =
  19. 19.38 × 8 =
  20. 20.33 × 4 =
  21. 21.27 × 8 =
  22. 22.23 × 4 =
  23. 23.16 × 8 =
  24. 24.57 × 4 =
  25. 25.28 × 8 =
  26. 26.29 × 4 =
  27. 27.20 × 8 =
  28. 28.35 × 8 =
  29. 29.26 × 8 =
  30. 30.36 × 8 =
  31. 31.67 × 4 =
  32. 32.68 × 4 =
  33. 33.39 × 8 =
  34. 34.25 × 8 =
  35. 35.22 × 8 =
  36. 36.31 × 8 =
  37. 37.46 × 4 =
  38. 38.38 × 4 =
  39. 39.26 × 4 =
  40. 40.61 × 4 =

Answer key

  1. 84
  2. 296
  3. 128
  4. 136
  5. 240
  6. 208
  7. 152
  8. 120
  9. 56
  10. 300
  11. 296
  12. 264
  13. 180
  14. 144
  15. 88
  16. 256
  17. 52
  18. 164
  19. 304
  20. 132
  21. 216
  22. 92
  23. 128
  24. 228
  25. 224
  26. 116
  27. 160
  28. 280
  29. 208
  30. 288
  31. 268
  32. 272
  33. 312
  34. 200
  35. 176
  36. 248
  37. 184
  38. 152
  39. 104
  40. 244

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