← 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 395 · 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. 1.23 × 8 =
  2. 2.33 × 8 =
  3. 3.15 × 8 =
  4. 4.35 × 8 =
  5. 5.32 × 8 =
  6. 6.69 × 4 =
  7. 7.44 × 4 =
  8. 8.16 × 8 =
  9. 9.19 × 4 =
  10. 10.38 × 8 =
  11. 11.12 × 4 =
  12. 12.20 × 8 =
  13. 13.36 × 8 =
  14. 14.34 × 8 =
  15. 15.31 × 4 =
  16. 16.46 × 4 =
  17. 17.28 × 8 =
  18. 18.60 × 4 =
  19. 19.65 × 4 =
  20. 20.30 × 4 =
  21. 21.20 × 4 =
  22. 22.26 × 4 =
  23. 23.56 × 4 =
  24. 24.16 × 4 =
  25. 25.18 × 4 =
  26. 26.29 × 8 =
  27. 27.37 × 8 =
  28. 28.19 × 8 =
  29. 29.70 × 4 =
  30. 30.75 × 4 =
  31. 31.45 × 4 =
  32. 32.14 × 8 =
  33. 33.62 × 4 =
  34. 34.25 × 4 =
  35. 35.18 × 8 =
  36. 36.24 × 8 =
  37. 37.54 × 4 =
  38. 38.15 × 4 =
  39. 39.22 × 4 =
  40. 40.34 × 4 =

Answer key

  1. 184
  2. 264
  3. 120
  4. 280
  5. 256
  6. 276
  7. 176
  8. 128
  9. 76
  10. 304
  11. 48
  12. 160
  13. 288
  14. 272
  15. 124
  16. 184
  17. 224
  18. 240
  19. 260
  20. 120
  21. 80
  22. 104
  23. 224
  24. 64
  25. 72
  26. 232
  27. 296
  28. 152
  29. 280
  30. 300
  31. 180
  32. 112
  33. 248
  34. 100
  35. 144
  36. 192
  37. 216
  38. 60
  39. 88
  40. 136

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