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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 523 · 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 × 4 =
  2. 2.17 × 4 =
  3. 3.26 × 8 =
  4. 4.45 × 4 =
  5. 5.36 × 8 =
  6. 6.16 × 8 =
  7. 7.40 × 4 =
  8. 8.17 × 8 =
  9. 9.46 × 4 =
  10. 10.51 × 4 =
  11. 11.28 × 8 =
  12. 12.66 × 4 =
  13. 13.75 × 4 =
  14. 14.22 × 8 =
  15. 15.20 × 8 =
  16. 16.57 × 4 =
  17. 17.35 × 8 =
  18. 18.18 × 4 =
  19. 19.21 × 8 =
  20. 20.27 × 4 =
  21. 21.12 × 8 =
  22. 22.42 × 4 =
  23. 23.12 × 4 =
  24. 24.15 × 8 =
  25. 25.15 × 4 =
  26. 26.23 × 8 =
  27. 27.39 × 4 =
  28. 28.41 × 4 =
  29. 29.52 × 4 =
  30. 30.13 × 8 =
  31. 31.40 × 8 =
  32. 32.59 × 4 =
  33. 33.29 × 4 =
  34. 34.16 × 4 =
  35. 35.38 × 8 =
  36. 36.19 × 8 =
  37. 37.31 × 4 =
  38. 38.25 × 4 =
  39. 39.47 × 4 =
  40. 40.62 × 4 =

Answer key

  1. 92
  2. 68
  3. 208
  4. 180
  5. 288
  6. 128
  7. 160
  8. 136
  9. 184
  10. 204
  11. 224
  12. 264
  13. 300
  14. 176
  15. 160
  16. 228
  17. 280
  18. 72
  19. 168
  20. 108
  21. 96
  22. 168
  23. 48
  24. 120
  25. 60
  26. 184
  27. 156
  28. 164
  29. 208
  30. 104
  31. 320
  32. 236
  33. 116
  34. 64
  35. 304
  36. 152
  37. 124
  38. 100
  39. 188
  40. 248

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