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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 914 · 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. 1.39 × 8 =
  2. 2.23 × 4 =
  3. 3.13 × 8 =
  4. 4.49 × 4 =
  5. 5.67 × 4 =
  6. 6.34 × 8 =
  7. 7.16 × 4 =
  8. 8.33 × 8 =
  9. 9.46 × 4 =
  10. 10.20 × 4 =
  11. 11.24 × 4 =
  12. 12.19 × 8 =
  13. 13.42 × 4 =
  14. 14.25 × 4 =
  15. 15.27 × 4 =
  16. 16.51 × 4 =
  17. 17.14 × 8 =
  18. 18.57 × 4 =
  19. 19.44 × 4 =
  20. 20.21 × 4 =
  21. 21.31 × 8 =
  22. 22.62 × 4 =
  23. 23.64 × 4 =
  24. 24.56 × 4 =
  25. 25.30 × 8 =
  26. 26.43 × 4 =
  27. 27.22 × 8 =
  28. 28.70 × 4 =
  29. 29.26 × 8 =
  30. 30.24 × 8 =
  31. 31.34 × 4 =
  32. 32.61 × 4 =
  33. 33.21 × 8 =
  34. 34.33 × 4 =
  35. 35.38 × 8 =
  36. 36.12 × 8 =
  37. 37.29 × 8 =
  38. 38.37 × 8 =
  39. 39.26 × 4 =
  40. 40.66 × 4 =

Answer key

  1. 312
  2. 92
  3. 104
  4. 196
  5. 268
  6. 272
  7. 64
  8. 264
  9. 184
  10. 80
  11. 96
  12. 152
  13. 168
  14. 100
  15. 108
  16. 204
  17. 112
  18. 228
  19. 176
  20. 84
  21. 248
  22. 248
  23. 256
  24. 224
  25. 240
  26. 172
  27. 176
  28. 280
  29. 208
  30. 192
  31. 136
  32. 244
  33. 168
  34. 132
  35. 304
  36. 96
  37. 232
  38. 296
  39. 104
  40. 264

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