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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 264 · 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. 1.48 × 4 =
  2. 2.21 × 8 =
  3. 3.37 × 8 =
  4. 4.29 × 8 =
  5. 5.28 × 8 =
  6. 6.24 × 8 =
  7. 7.27 × 4 =
  8. 8.18 × 4 =
  9. 9.33 × 8 =
  10. 10.39 × 8 =
  11. 11.12 × 8 =
  12. 12.32 × 4 =
  13. 13.26 × 8 =
  14. 14.55 × 4 =
  15. 15.58 × 4 =
  16. 16.60 × 4 =
  17. 17.70 × 4 =
  18. 18.18 × 8 =
  19. 19.74 × 4 =
  20. 20.31 × 8 =
  21. 21.22 × 8 =
  22. 22.57 × 4 =
  23. 23.15 × 4 =
  24. 24.39 × 4 =
  25. 25.36 × 8 =
  26. 26.32 × 8 =
  27. 27.66 × 4 =
  28. 28.37 × 4 =
  29. 29.20 × 8 =
  30. 30.40 × 8 =
  31. 31.19 × 8 =
  32. 32.62 × 4 =
  33. 33.72 × 4 =
  34. 34.52 × 4 =
  35. 35.51 × 4 =
  36. 36.12 × 4 =
  37. 37.42 × 4 =
  38. 38.31 × 4 =
  39. 39.14 × 8 =
  40. 40.54 × 4 =

Answer key

  1. 192
  2. 168
  3. 296
  4. 232
  5. 224
  6. 192
  7. 108
  8. 72
  9. 264
  10. 312
  11. 96
  12. 128
  13. 208
  14. 220
  15. 232
  16. 240
  17. 280
  18. 144
  19. 296
  20. 248
  21. 176
  22. 228
  23. 60
  24. 156
  25. 288
  26. 256
  27. 264
  28. 148
  29. 160
  30. 320
  31. 152
  32. 248
  33. 288
  34. 208
  35. 204
  36. 48
  37. 168
  38. 124
  39. 112
  40. 216

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