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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 193 · 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. 1.24 × 4 =
  2. 2.64 × 4 =
  3. 3.65 × 4 =
  4. 4.14 × 8 =
  5. 5.22 × 8 =
  6. 6.15 × 8 =
  7. 7.66 × 4 =
  8. 8.32 × 8 =
  9. 9.28 × 8 =
  10. 10.24 × 8 =
  11. 11.30 × 4 =
  12. 12.67 × 4 =
  13. 13.27 × 4 =
  14. 14.69 × 4 =
  15. 15.72 × 4 =
  16. 16.19 × 4 =
  17. 17.16 × 4 =
  18. 18.16 × 8 =
  19. 19.20 × 8 =
  20. 20.26 × 8 =
  21. 21.61 × 4 =
  22. 22.17 × 4 =
  23. 23.40 × 8 =
  24. 24.21 × 4 =
  25. 25.29 × 4 =
  26. 26.15 × 4 =
  27. 27.58 × 4 =
  28. 28.13 × 8 =
  29. 29.39 × 8 =
  30. 30.48 × 4 =
  31. 31.46 × 4 =
  32. 32.19 × 8 =
  33. 33.29 × 8 =
  34. 34.12 × 4 =
  35. 35.18 × 8 =
  36. 36.74 × 4 =
  37. 37.56 × 4 =
  38. 38.37 × 8 =
  39. 39.25 × 8 =
  40. 40.22 × 4 =

Answer key

  1. 96
  2. 256
  3. 260
  4. 112
  5. 176
  6. 120
  7. 264
  8. 256
  9. 224
  10. 192
  11. 120
  12. 268
  13. 108
  14. 276
  15. 288
  16. 76
  17. 64
  18. 128
  19. 160
  20. 208
  21. 244
  22. 68
  23. 320
  24. 84
  25. 116
  26. 60
  27. 232
  28. 104
  29. 312
  30. 192
  31. 184
  32. 152
  33. 232
  34. 48
  35. 144
  36. 296
  37. 224
  38. 296
  39. 200
  40. 88

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