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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 633 · 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. 1.18 × 4 =
  2. 2.31 × 8 =
  3. 3.33 × 8 =
  4. 4.19 × 4 =
  5. 5.22 × 4 =
  6. 6.13 × 8 =
  7. 7.12 × 8 =
  8. 8.15 × 8 =
  9. 9.17 × 8 =
  10. 10.68 × 4 =
  11. 11.37 × 8 =
  12. 12.23 × 8 =
  13. 13.13 × 4 =
  14. 14.15 × 4 =
  15. 15.30 × 8 =
  16. 16.26 × 4 =
  17. 17.28 × 8 =
  18. 18.40 × 8 =
  19. 19.42 × 4 =
  20. 20.39 × 4 =
  21. 21.48 × 4 =
  22. 22.44 × 4 =
  23. 23.46 × 4 =
  24. 24.57 × 4 =
  25. 25.51 × 4 =
  26. 26.47 × 4 =
  27. 27.36 × 4 =
  28. 28.19 × 8 =
  29. 29.73 × 4 =
  30. 30.49 × 4 =
  31. 31.32 × 8 =
  32. 32.34 × 8 =
  33. 33.24 × 8 =
  34. 34.14 × 8 =
  35. 35.66 × 4 =
  36. 36.14 × 4 =
  37. 37.21 × 4 =
  38. 38.27 × 8 =
  39. 39.20 × 8 =
  40. 40.62 × 4 =

Answer key

  1. 72
  2. 248
  3. 264
  4. 76
  5. 88
  6. 104
  7. 96
  8. 120
  9. 136
  10. 272
  11. 296
  12. 184
  13. 52
  14. 60
  15. 240
  16. 104
  17. 224
  18. 320
  19. 168
  20. 156
  21. 192
  22. 176
  23. 184
  24. 228
  25. 204
  26. 188
  27. 144
  28. 152
  29. 292
  30. 196
  31. 256
  32. 272
  33. 192
  34. 112
  35. 264
  36. 56
  37. 84
  38. 216
  39. 160
  40. 248

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