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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 73 · 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. 1.12 × 8 =
  2. 2.71 × 4 =
  3. 3.51 × 4 =
  4. 4.18 × 4 =
  5. 5.19 × 8 =
  6. 6.34 × 4 =
  7. 7.33 × 4 =
  8. 8.64 × 4 =
  9. 9.12 × 4 =
  10. 10.35 × 8 =
  11. 11.66 × 4 =
  12. 12.39 × 4 =
  13. 13.60 × 4 =
  14. 14.14 × 4 =
  15. 15.27 × 8 =
  16. 16.13 × 4 =
  17. 17.32 × 8 =
  18. 18.69 × 4 =
  19. 19.15 × 4 =
  20. 20.16 × 4 =
  21. 21.37 × 4 =
  22. 22.13 × 8 =
  23. 23.26 × 8 =
  24. 24.27 × 4 =
  25. 25.31 × 4 =
  26. 26.53 × 4 =
  27. 27.28 × 8 =
  28. 28.15 × 8 =
  29. 29.18 × 8 =
  30. 30.36 × 8 =
  31. 31.17 × 8 =
  32. 32.21 × 8 =
  33. 33.44 × 4 =
  34. 34.59 × 4 =
  35. 35.25 × 4 =
  36. 36.65 × 4 =
  37. 37.50 × 4 =
  38. 38.21 × 4 =
  39. 39.54 × 4 =
  40. 40.46 × 4 =

Answer key

  1. 96
  2. 284
  3. 204
  4. 72
  5. 152
  6. 136
  7. 132
  8. 256
  9. 48
  10. 280
  11. 264
  12. 156
  13. 240
  14. 56
  15. 216
  16. 52
  17. 256
  18. 276
  19. 60
  20. 64
  21. 148
  22. 104
  23. 208
  24. 108
  25. 124
  26. 212
  27. 224
  28. 120
  29. 144
  30. 288
  31. 136
  32. 168
  33. 176
  34. 236
  35. 100
  36. 260
  37. 200
  38. 84
  39. 216
  40. 184

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