← 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 987 · 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. 1.14 × 8 =
  2. 2.66 × 4 =
  3. 3.34 × 4 =
  4. 4.35 × 8 =
  5. 5.12 × 8 =
  6. 6.24 × 8 =
  7. 7.27 × 4 =
  8. 8.39 × 4 =
  9. 9.34 × 8 =
  10. 10.53 × 4 =
  11. 11.49 × 4 =
  12. 12.32 × 8 =
  13. 13.38 × 8 =
  14. 14.54 × 4 =
  15. 15.19 × 4 =
  16. 16.55 × 4 =
  17. 17.40 × 8 =
  18. 18.57 × 4 =
  19. 19.25 × 8 =
  20. 20.75 × 4 =
  21. 21.33 × 4 =
  22. 22.16 × 8 =
  23. 23.30 × 8 =
  24. 24.60 × 4 =
  25. 25.17 × 8 =
  26. 26.61 × 4 =
  27. 27.63 × 4 =
  28. 28.28 × 4 =
  29. 29.20 × 4 =
  30. 30.50 × 4 =
  31. 31.58 × 4 =
  32. 32.39 × 8 =
  33. 33.44 × 4 =
  34. 34.18 × 4 =
  35. 35.15 × 8 =
  36. 36.28 × 8 =
  37. 37.26 × 8 =
  38. 38.40 × 4 =
  39. 39.48 × 4 =
  40. 40.13 × 8 =

Answer key

  1. 112
  2. 264
  3. 136
  4. 280
  5. 96
  6. 192
  7. 108
  8. 156
  9. 272
  10. 212
  11. 196
  12. 256
  13. 304
  14. 216
  15. 76
  16. 220
  17. 320
  18. 228
  19. 200
  20. 300
  21. 132
  22. 128
  23. 240
  24. 240
  25. 136
  26. 244
  27. 252
  28. 112
  29. 80
  30. 200
  31. 232
  32. 312
  33. 176
  34. 72
  35. 120
  36. 224
  37. 208
  38. 160
  39. 192
  40. 104

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