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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 794 · 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. 1.29 × 8 =
  2. 2.26 × 4 =
  3. 3.26 × 8 =
  4. 4.21 × 8 =
  5. 5.61 × 4 =
  6. 6.30 × 8 =
  7. 7.64 × 4 =
  8. 8.20 × 8 =
  9. 9.29 × 4 =
  10. 10.62 × 4 =
  11. 11.19 × 8 =
  12. 12.16 × 4 =
  13. 13.46 × 4 =
  14. 14.14 × 8 =
  15. 15.15 × 8 =
  16. 16.31 × 8 =
  17. 17.32 × 8 =
  18. 18.31 × 4 =
  19. 19.12 × 8 =
  20. 20.38 × 4 =
  21. 21.16 × 8 =
  22. 22.14 × 4 =
  23. 23.60 × 4 =
  24. 24.73 × 4 =
  25. 25.35 × 8 =
  26. 26.58 × 4 =
  27. 27.17 × 8 =
  28. 28.36 × 8 =
  29. 29.18 × 8 =
  30. 30.13 × 4 =
  31. 31.38 × 8 =
  32. 32.27 × 8 =
  33. 33.57 × 4 =
  34. 34.63 × 4 =
  35. 35.30 × 4 =
  36. 36.68 × 4 =
  37. 37.19 × 4 =
  38. 38.22 × 4 =
  39. 39.39 × 8 =
  40. 40.43 × 4 =

Answer key

  1. 232
  2. 104
  3. 208
  4. 168
  5. 244
  6. 240
  7. 256
  8. 160
  9. 116
  10. 248
  11. 152
  12. 64
  13. 184
  14. 112
  15. 120
  16. 248
  17. 256
  18. 124
  19. 96
  20. 152
  21. 128
  22. 56
  23. 240
  24. 292
  25. 280
  26. 232
  27. 136
  28. 288
  29. 144
  30. 52
  31. 304
  32. 216
  33. 228
  34. 252
  35. 120
  36. 272
  37. 76
  38. 88
  39. 312
  40. 172

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