← 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 309 · 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. 1.36 × 8 =
  2. 2.13 × 8 =
  3. 3.40 × 8 =
  4. 4.30 × 8 =
  5. 5.12 × 4 =
  6. 6.65 × 4 =
  7. 7.17 × 8 =
  8. 8.34 × 8 =
  9. 9.26 × 8 =
  10. 10.18 × 8 =
  11. 11.15 × 4 =
  12. 12.15 × 8 =
  13. 13.54 × 4 =
  14. 14.17 × 4 =
  15. 15.22 × 8 =
  16. 16.20 × 8 =
  17. 17.36 × 4 =
  18. 18.40 × 4 =
  19. 19.60 × 4 =
  20. 20.12 × 8 =
  21. 21.58 × 4 =
  22. 22.30 × 4 =
  23. 23.72 × 4 =
  24. 24.20 × 4 =
  25. 25.18 × 4 =
  26. 26.28 × 8 =
  27. 27.74 × 4 =
  28. 28.35 × 8 =
  29. 29.41 × 4 =
  30. 30.35 × 4 =
  31. 31.22 × 4 =
  32. 32.42 × 4 =
  33. 33.19 × 4 =
  34. 34.24 × 8 =
  35. 35.13 × 4 =
  36. 36.23 × 8 =
  37. 37.59 × 4 =
  38. 38.31 × 8 =
  39. 39.53 × 4 =
  40. 40.32 × 4 =

Answer key

  1. 288
  2. 104
  3. 320
  4. 240
  5. 48
  6. 260
  7. 136
  8. 272
  9. 208
  10. 144
  11. 60
  12. 120
  13. 216
  14. 68
  15. 176
  16. 160
  17. 144
  18. 160
  19. 240
  20. 96
  21. 232
  22. 120
  23. 288
  24. 80
  25. 72
  26. 224
  27. 296
  28. 280
  29. 164
  30. 140
  31. 88
  32. 168
  33. 76
  34. 192
  35. 52
  36. 184
  37. 236
  38. 248
  39. 212
  40. 128

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