← 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 923 · 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. 1.39 × 8 =
  2. 2.44 × 4 =
  3. 3.57 × 4 =
  4. 4.19 × 8 =
  5. 5.58 × 4 =
  6. 6.40 × 4 =
  7. 7.25 × 4 =
  8. 8.28 × 8 =
  9. 9.73 × 4 =
  10. 10.26 × 8 =
  11. 11.40 × 8 =
  12. 12.22 × 4 =
  13. 13.23 × 4 =
  14. 14.48 × 4 =
  15. 15.59 × 4 =
  16. 16.37 × 4 =
  17. 17.15 × 8 =
  18. 18.24 × 4 =
  19. 19.38 × 4 =
  20. 20.63 × 4 =
  21. 21.46 × 4 =
  22. 22.12 × 8 =
  23. 23.35 × 4 =
  24. 24.34 × 8 =
  25. 25.14 × 4 =
  26. 26.20 × 8 =
  27. 27.38 × 8 =
  28. 28.36 × 4 =
  29. 29.27 × 8 =
  30. 30.13 × 4 =
  31. 31.30 × 8 =
  32. 32.33 × 8 =
  33. 33.43 × 4 =
  34. 34.21 × 4 =
  35. 35.36 × 8 =
  36. 36.34 × 4 =
  37. 37.17 × 4 =
  38. 38.26 × 4 =
  39. 39.71 × 4 =
  40. 40.18 × 4 =

Answer key

  1. 312
  2. 176
  3. 228
  4. 152
  5. 232
  6. 160
  7. 100
  8. 224
  9. 292
  10. 208
  11. 320
  12. 88
  13. 92
  14. 192
  15. 236
  16. 148
  17. 120
  18. 96
  19. 152
  20. 252
  21. 184
  22. 96
  23. 140
  24. 272
  25. 56
  26. 160
  27. 304
  28. 144
  29. 216
  30. 52
  31. 240
  32. 264
  33. 172
  34. 84
  35. 288
  36. 136
  37. 68
  38. 104
  39. 284
  40. 72

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