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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 726 · 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. 1.25 × 8 =
  2. 2.15 × 4 =
  3. 3.17 × 8 =
  4. 4.27 × 4 =
  5. 5.38 × 8 =
  6. 6.13 × 8 =
  7. 7.44 × 4 =
  8. 8.64 × 4 =
  9. 9.21 × 4 =
  10. 10.36 × 8 =
  11. 11.31 × 4 =
  12. 12.40 × 4 =
  13. 13.37 × 8 =
  14. 14.30 × 4 =
  15. 15.26 × 8 =
  16. 16.19 × 4 =
  17. 17.24 × 4 =
  18. 18.40 × 8 =
  19. 19.54 × 4 =
  20. 20.51 × 4 =
  21. 21.58 × 4 =
  22. 22.57 × 4 =
  23. 23.15 × 8 =
  24. 24.43 × 4 =
  25. 25.21 × 8 =
  26. 26.25 × 4 =
  27. 27.18 × 8 =
  28. 28.17 × 4 =
  29. 29.60 × 4 =
  30. 30.24 × 8 =
  31. 31.20 × 8 =
  32. 32.16 × 8 =
  33. 33.14 × 8 =
  34. 34.75 × 4 =
  35. 35.74 × 4 =
  36. 36.50 × 4 =
  37. 37.33 × 4 =
  38. 38.39 × 8 =
  39. 39.35 × 8 =
  40. 40.36 × 4 =

Answer key

  1. 200
  2. 60
  3. 136
  4. 108
  5. 304
  6. 104
  7. 176
  8. 256
  9. 84
  10. 288
  11. 124
  12. 160
  13. 296
  14. 120
  15. 208
  16. 76
  17. 96
  18. 320
  19. 216
  20. 204
  21. 232
  22. 228
  23. 120
  24. 172
  25. 168
  26. 100
  27. 144
  28. 68
  29. 240
  30. 192
  31. 160
  32. 128
  33. 112
  34. 300
  35. 296
  36. 200
  37. 132
  38. 312
  39. 280
  40. 144

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