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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 227 · 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. 1.15 × 8 =
  2. 2.23 × 8 =
  3. 3.19 × 8 =
  4. 4.36 × 8 =
  5. 5.16 × 4 =
  6. 6.35 × 8 =
  7. 7.17 × 8 =
  8. 8.18 × 4 =
  9. 9.27 × 8 =
  10. 10.24 × 4 =
  11. 11.59 × 4 =
  12. 12.37 × 8 =
  13. 13.46 × 4 =
  14. 14.31 × 8 =
  15. 15.15 × 4 =
  16. 16.13 × 8 =
  17. 17.14 × 8 =
  18. 18.24 × 8 =
  19. 19.27 × 4 =
  20. 20.68 × 4 =
  21. 21.52 × 4 =
  22. 22.41 × 4 =
  23. 23.20 × 8 =
  24. 24.56 × 4 =
  25. 25.22 × 4 =
  26. 26.28 × 8 =
  27. 27.53 × 4 =
  28. 28.39 × 8 =
  29. 29.40 × 4 =
  30. 30.47 × 4 =
  31. 31.37 × 4 =
  32. 32.51 × 4 =
  33. 33.64 × 4 =
  34. 34.17 × 4 =
  35. 35.26 × 8 =
  36. 36.35 × 4 =
  37. 37.40 × 8 =
  38. 38.18 × 8 =
  39. 39.55 × 4 =
  40. 40.38 × 8 =

Answer key

  1. 120
  2. 184
  3. 152
  4. 288
  5. 64
  6. 280
  7. 136
  8. 72
  9. 216
  10. 96
  11. 236
  12. 296
  13. 184
  14. 248
  15. 60
  16. 104
  17. 112
  18. 192
  19. 108
  20. 272
  21. 208
  22. 164
  23. 160
  24. 224
  25. 88
  26. 224
  27. 212
  28. 312
  29. 160
  30. 188
  31. 148
  32. 204
  33. 256
  34. 68
  35. 208
  36. 140
  37. 320
  38. 144
  39. 220
  40. 304

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