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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 512 · 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. 1.13 × 8 =
  2. 2.23 × 8 =
  3. 3.33 × 4 =
  4. 4.26 × 4 =
  5. 5.18 × 8 =
  6. 6.32 × 4 =
  7. 7.37 × 4 =
  8. 8.57 × 4 =
  9. 9.32 × 8 =
  10. 10.25 × 4 =
  11. 11.20 × 8 =
  12. 12.29 × 8 =
  13. 13.72 × 4 =
  14. 14.36 × 8 =
  15. 15.46 × 4 =
  16. 16.28 × 8 =
  17. 17.30 × 4 =
  18. 18.59 × 4 =
  19. 19.34 × 4 =
  20. 20.62 × 4 =
  21. 21.39 × 8 =
  22. 22.63 × 4 =
  23. 23.33 × 8 =
  24. 24.37 × 8 =
  25. 25.70 × 4 =
  26. 26.74 × 4 =
  27. 27.24 × 8 =
  28. 28.31 × 8 =
  29. 29.23 × 4 =
  30. 30.18 × 4 =
  31. 31.19 × 4 =
  32. 32.21 × 4 =
  33. 33.20 × 4 =
  34. 34.29 × 4 =
  35. 35.39 × 4 =
  36. 36.68 × 4 =
  37. 37.16 × 8 =
  38. 38.17 × 4 =
  39. 39.22 × 4 =
  40. 40.15 × 8 =

Answer key

  1. 104
  2. 184
  3. 132
  4. 104
  5. 144
  6. 128
  7. 148
  8. 228
  9. 256
  10. 100
  11. 160
  12. 232
  13. 288
  14. 288
  15. 184
  16. 224
  17. 120
  18. 236
  19. 136
  20. 248
  21. 312
  22. 252
  23. 264
  24. 296
  25. 280
  26. 296
  27. 192
  28. 248
  29. 92
  30. 72
  31. 76
  32. 84
  33. 80
  34. 116
  35. 156
  36. 272
  37. 128
  38. 68
  39. 88
  40. 120

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