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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 156 · 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. 1.40 × 4 =
  2. 2.52 × 4 =
  3. 3.29 × 8 =
  4. 4.48 × 4 =
  5. 5.12 × 8 =
  6. 6.33 × 8 =
  7. 7.43 × 4 =
  8. 8.14 × 8 =
  9. 9.57 × 4 =
  10. 10.20 × 8 =
  11. 11.34 × 8 =
  12. 12.38 × 8 =
  13. 13.21 × 8 =
  14. 14.63 × 4 =
  15. 15.33 × 4 =
  16. 16.13 × 4 =
  17. 17.46 × 4 =
  18. 18.26 × 8 =
  19. 19.31 × 8 =
  20. 20.22 × 4 =
  21. 21.30 × 4 =
  22. 22.69 × 4 =
  23. 23.24 × 8 =
  24. 24.25 × 8 =
  25. 25.55 × 4 =
  26. 26.73 × 4 =
  27. 27.23 × 8 =
  28. 28.27 × 4 =
  29. 29.19 × 8 =
  30. 30.17 × 4 =
  31. 31.30 × 8 =
  32. 32.18 × 8 =
  33. 33.70 × 4 =
  34. 34.50 × 4 =
  35. 35.54 × 4 =
  36. 36.15 × 4 =
  37. 37.24 × 4 =
  38. 38.31 × 4 =
  39. 39.19 × 4 =
  40. 40.27 × 8 =

Answer key

  1. 160
  2. 208
  3. 232
  4. 192
  5. 96
  6. 264
  7. 172
  8. 112
  9. 228
  10. 160
  11. 272
  12. 304
  13. 168
  14. 252
  15. 132
  16. 52
  17. 184
  18. 208
  19. 248
  20. 88
  21. 120
  22. 276
  23. 192
  24. 200
  25. 220
  26. 292
  27. 184
  28. 108
  29. 152
  30. 68
  31. 240
  32. 144
  33. 280
  34. 200
  35. 216
  36. 60
  37. 96
  38. 124
  39. 76
  40. 216

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