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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 666 · 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. 1.56 × 4 =
  2. 2.39 × 4 =
  3. 3.13 × 8 =
  4. 4.74 × 4 =
  5. 5.20 × 8 =
  6. 6.22 × 4 =
  7. 7.33 × 8 =
  8. 8.68 × 4 =
  9. 9.17 × 4 =
  10. 10.57 × 4 =
  11. 11.14 × 8 =
  12. 12.17 × 8 =
  13. 13.28 × 8 =
  14. 14.36 × 8 =
  15. 15.66 × 4 =
  16. 16.38 × 8 =
  17. 17.16 × 8 =
  18. 18.32 × 8 =
  19. 19.18 × 8 =
  20. 20.23 × 4 =
  21. 21.26 × 8 =
  22. 22.20 × 4 =
  23. 23.25 × 8 =
  24. 24.19 × 8 =
  25. 25.18 × 4 =
  26. 26.30 × 4 =
  27. 27.12 × 8 =
  28. 28.34 × 8 =
  29. 29.23 × 8 =
  30. 30.49 × 4 =
  31. 31.31 × 8 =
  32. 32.24 × 4 =
  33. 33.64 × 4 =
  34. 34.70 × 4 =
  35. 35.41 × 4 =
  36. 36.61 × 4 =
  37. 37.19 × 4 =
  38. 38.27 × 8 =
  39. 39.60 × 4 =
  40. 40.39 × 8 =

Answer key

  1. 224
  2. 156
  3. 104
  4. 296
  5. 160
  6. 88
  7. 264
  8. 272
  9. 68
  10. 228
  11. 112
  12. 136
  13. 224
  14. 288
  15. 264
  16. 304
  17. 128
  18. 256
  19. 144
  20. 92
  21. 208
  22. 80
  23. 200
  24. 152
  25. 72
  26. 120
  27. 96
  28. 272
  29. 184
  30. 196
  31. 248
  32. 96
  33. 256
  34. 280
  35. 164
  36. 244
  37. 76
  38. 216
  39. 240
  40. 312

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