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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 750 · 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. 1.17 × 8 =
  2. 2.36 × 4 =
  3. 3.41 × 4 =
  4. 4.24 × 4 =
  5. 5.42 × 4 =
  6. 6.30 × 8 =
  7. 7.74 × 4 =
  8. 8.26 × 4 =
  9. 9.12 × 8 =
  10. 10.18 × 4 =
  11. 11.25 × 8 =
  12. 12.46 × 4 =
  13. 13.31 × 4 =
  14. 14.39 × 4 =
  15. 15.50 × 4 =
  16. 16.21 × 8 =
  17. 17.38 × 4 =
  18. 18.68 × 4 =
  19. 19.28 × 8 =
  20. 20.23 × 8 =
  21. 21.34 × 4 =
  22. 22.13 × 8 =
  23. 23.15 × 8 =
  24. 24.14 × 8 =
  25. 25.24 × 8 =
  26. 26.29 × 8 =
  27. 27.33 × 8 =
  28. 28.16 × 4 =
  29. 29.52 × 4 =
  30. 30.37 × 8 =
  31. 31.20 × 4 =
  32. 32.34 × 8 =
  33. 33.51 × 4 =
  34. 34.38 × 8 =
  35. 35.70 × 4 =
  36. 36.63 × 4 =
  37. 37.71 × 4 =
  38. 38.33 × 4 =
  39. 39.57 × 4 =
  40. 40.44 × 4 =

Answer key

  1. 136
  2. 144
  3. 164
  4. 96
  5. 168
  6. 240
  7. 296
  8. 104
  9. 96
  10. 72
  11. 200
  12. 184
  13. 124
  14. 156
  15. 200
  16. 168
  17. 152
  18. 272
  19. 224
  20. 184
  21. 136
  22. 104
  23. 120
  24. 112
  25. 192
  26. 232
  27. 264
  28. 64
  29. 208
  30. 296
  31. 80
  32. 272
  33. 204
  34. 304
  35. 280
  36. 252
  37. 284
  38. 132
  39. 228
  40. 176

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