← 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 932 · 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. 1.29 × 8 =
  2. 2.59 × 4 =
  3. 3.75 × 4 =
  4. 4.55 × 4 =
  5. 5.18 × 8 =
  6. 6.57 × 4 =
  7. 7.35 × 8 =
  8. 8.24 × 8 =
  9. 9.31 × 8 =
  10. 10.72 × 4 =
  11. 11.25 × 8 =
  12. 12.23 × 4 =
  13. 13.30 × 8 =
  14. 14.15 × 8 =
  15. 15.28 × 4 =
  16. 16.70 × 4 =
  17. 17.14 × 8 =
  18. 18.35 × 4 =
  19. 19.12 × 8 =
  20. 20.20 × 4 =
  21. 21.13 × 4 =
  22. 22.19 × 8 =
  23. 23.51 × 4 =
  24. 24.37 × 8 =
  25. 25.27 × 8 =
  26. 26.32 × 8 =
  27. 27.50 × 4 =
  28. 28.46 × 4 =
  29. 29.54 × 4 =
  30. 30.16 × 8 =
  31. 31.23 × 8 =
  32. 32.13 × 8 =
  33. 33.30 × 4 =
  34. 34.21 × 4 =
  35. 35.22 × 4 =
  36. 36.63 × 4 =
  37. 37.25 × 4 =
  38. 38.60 × 4 =
  39. 39.28 × 8 =
  40. 40.33 × 8 =

Answer key

  1. 232
  2. 236
  3. 300
  4. 220
  5. 144
  6. 228
  7. 280
  8. 192
  9. 248
  10. 288
  11. 200
  12. 92
  13. 240
  14. 120
  15. 112
  16. 280
  17. 112
  18. 140
  19. 96
  20. 80
  21. 52
  22. 152
  23. 204
  24. 296
  25. 216
  26. 256
  27. 200
  28. 184
  29. 216
  30. 128
  31. 184
  32. 104
  33. 120
  34. 84
  35. 88
  36. 252
  37. 100
  38. 240
  39. 224
  40. 264

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