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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 158 · 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 × 8 =
  2. 2.32 × 4 =
  3. 3.27 × 8 =
  4. 4.71 × 4 =
  5. 5.19 × 8 =
  6. 6.64 × 4 =
  7. 7.23 × 4 =
  8. 8.21 × 8 =
  9. 9.26 × 4 =
  10. 10.66 × 4 =
  11. 11.70 × 4 =
  12. 12.22 × 4 =
  13. 13.28 × 4 =
  14. 14.17 × 8 =
  15. 15.31 × 4 =
  16. 16.33 × 4 =
  17. 17.16 × 8 =
  18. 18.31 × 8 =
  19. 19.33 × 8 =
  20. 20.32 × 8 =
  21. 21.12 × 8 =
  22. 22.25 × 8 =
  23. 23.56 × 4 =
  24. 24.74 × 4 =
  25. 25.12 × 4 =
  26. 26.20 × 4 =
  27. 27.17 × 4 =
  28. 28.58 × 4 =
  29. 29.46 × 4 =
  30. 30.15 × 8 =
  31. 31.54 × 4 =
  32. 32.52 × 4 =
  33. 33.18 × 8 =
  34. 34.57 × 4 =
  35. 35.22 × 8 =
  36. 36.48 × 4 =
  37. 37.13 × 4 =
  38. 38.35 × 8 =
  39. 39.26 × 8 =
  40. 40.13 × 8 =

Answer key

  1. 192
  2. 128
  3. 216
  4. 284
  5. 152
  6. 256
  7. 92
  8. 168
  9. 104
  10. 264
  11. 280
  12. 88
  13. 112
  14. 136
  15. 124
  16. 132
  17. 128
  18. 248
  19. 264
  20. 256
  21. 96
  22. 200
  23. 224
  24. 296
  25. 48
  26. 80
  27. 68
  28. 232
  29. 184
  30. 120
  31. 216
  32. 208
  33. 144
  34. 228
  35. 176
  36. 192
  37. 52
  38. 280
  39. 208
  40. 104

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