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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 499 · 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 × 8 =
  2. 2.44 × 4 =
  3. 3.32 × 8 =
  4. 4.19 × 8 =
  5. 5.35 × 8 =
  6. 6.28 × 8 =
  7. 7.34 × 8 =
  8. 8.28 × 4 =
  9. 9.13 × 4 =
  10. 10.12 × 8 =
  11. 11.37 × 4 =
  12. 12.12 × 4 =
  13. 13.16 × 4 =
  14. 14.15 × 8 =
  15. 15.15 × 4 =
  16. 16.39 × 8 =
  17. 17.13 × 8 =
  18. 18.66 × 4 =
  19. 19.57 × 4 =
  20. 20.23 × 8 =
  21. 21.60 × 4 =
  22. 22.21 × 8 =
  23. 23.19 × 4 =
  24. 24.20 × 8 =
  25. 25.67 × 4 =
  26. 26.25 × 8 =
  27. 27.33 × 4 =
  28. 28.17 × 4 =
  29. 29.14 × 4 =
  30. 30.34 × 4 =
  31. 31.24 × 4 =
  32. 32.29 × 4 =
  33. 33.29 × 8 =
  34. 34.38 × 8 =
  35. 35.21 × 4 =
  36. 36.37 × 8 =
  37. 37.25 × 4 =
  38. 38.22 × 4 =
  39. 39.59 × 4 =
  40. 40.62 × 4 =

Answer key

  1. 144
  2. 176
  3. 256
  4. 152
  5. 280
  6. 224
  7. 272
  8. 112
  9. 52
  10. 96
  11. 148
  12. 48
  13. 64
  14. 120
  15. 60
  16. 312
  17. 104
  18. 264
  19. 228
  20. 184
  21. 240
  22. 168
  23. 76
  24. 160
  25. 268
  26. 200
  27. 132
  28. 68
  29. 56
  30. 136
  31. 96
  32. 116
  33. 232
  34. 304
  35. 84
  36. 296
  37. 100
  38. 88
  39. 236
  40. 248

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