← 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 199 · 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. 1.17 × 8 =
  2. 2.37 × 8 =
  3. 3.20 × 4 =
  4. 4.64 × 4 =
  5. 5.28 × 8 =
  6. 6.66 × 4 =
  7. 7.44 × 4 =
  8. 8.14 × 4 =
  9. 9.54 × 4 =
  10. 10.46 × 4 =
  11. 11.27 × 8 =
  12. 12.65 × 4 =
  13. 13.25 × 4 =
  14. 14.19 × 4 =
  15. 15.69 × 4 =
  16. 16.40 × 8 =
  17. 17.20 × 8 =
  18. 18.50 × 4 =
  19. 19.16 × 4 =
  20. 20.38 × 8 =
  21. 21.52 × 4 =
  22. 22.17 × 4 =
  23. 23.35 × 4 =
  24. 24.33 × 4 =
  25. 25.25 × 8 =
  26. 26.23 × 8 =
  27. 27.29 × 8 =
  28. 28.31 × 8 =
  29. 29.12 × 8 =
  30. 30.34 × 8 =
  31. 31.70 × 4 =
  32. 32.45 × 4 =
  33. 33.28 × 4 =
  34. 34.18 × 8 =
  35. 35.19 × 8 =
  36. 36.13 × 4 =
  37. 37.72 × 4 =
  38. 38.13 × 8 =
  39. 39.24 × 4 =
  40. 40.62 × 4 =

Answer key

  1. 136
  2. 296
  3. 80
  4. 256
  5. 224
  6. 264
  7. 176
  8. 56
  9. 216
  10. 184
  11. 216
  12. 260
  13. 100
  14. 76
  15. 276
  16. 320
  17. 160
  18. 200
  19. 64
  20. 304
  21. 208
  22. 68
  23. 140
  24. 132
  25. 200
  26. 184
  27. 232
  28. 248
  29. 96
  30. 272
  31. 280
  32. 180
  33. 112
  34. 144
  35. 152
  36. 52
  37. 288
  38. 104
  39. 96
  40. 248

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