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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 389 · 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 × 4 =
  2. 2.74 × 4 =
  3. 3.33 × 8 =
  4. 4.21 × 8 =
  5. 5.32 × 8 =
  6. 6.26 × 8 =
  7. 7.43 × 4 =
  8. 8.27 × 4 =
  9. 9.75 × 4 =
  10. 10.28 × 4 =
  11. 11.12 × 8 =
  12. 12.20 × 4 =
  13. 13.18 × 8 =
  14. 14.27 × 8 =
  15. 15.31 × 8 =
  16. 16.46 × 4 =
  17. 17.39 × 8 =
  18. 18.20 × 8 =
  19. 19.34 × 8 =
  20. 20.42 × 4 =
  21. 21.16 × 4 =
  22. 22.29 × 4 =
  23. 23.72 × 4 =
  24. 24.18 × 4 =
  25. 25.55 × 4 =
  26. 26.66 × 4 =
  27. 27.38 × 4 =
  28. 28.28 × 8 =
  29. 29.35 × 4 =
  30. 30.17 × 4 =
  31. 31.64 × 4 =
  32. 32.17 × 8 =
  33. 33.14 × 8 =
  34. 34.13 × 8 =
  35. 35.14 × 4 =
  36. 36.30 × 8 =
  37. 37.52 × 4 =
  38. 38.40 × 4 =
  39. 39.29 × 8 =
  40. 40.34 × 4 =

Answer key

  1. 156
  2. 296
  3. 264
  4. 168
  5. 256
  6. 208
  7. 172
  8. 108
  9. 300
  10. 112
  11. 96
  12. 80
  13. 144
  14. 216
  15. 248
  16. 184
  17. 312
  18. 160
  19. 272
  20. 168
  21. 64
  22. 116
  23. 288
  24. 72
  25. 220
  26. 264
  27. 152
  28. 224
  29. 140
  30. 68
  31. 256
  32. 136
  33. 112
  34. 104
  35. 56
  36. 240
  37. 208
  38. 160
  39. 232
  40. 136

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