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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 55 · 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. 1.27 × 8 =
  2. 2.39 × 8 =
  3. 3.73 × 4 =
  4. 4.57 × 4 =
  5. 5.13 × 8 =
  6. 6.25 × 8 =
  7. 7.17 × 4 =
  8. 8.31 × 4 =
  9. 9.72 × 4 =
  10. 10.56 × 4 =
  11. 11.21 × 8 =
  12. 12.14 × 8 =
  13. 13.12 × 8 =
  14. 14.35 × 8 =
  15. 15.18 × 8 =
  16. 16.66 × 4 =
  17. 17.34 × 8 =
  18. 18.12 × 4 =
  19. 19.36 × 4 =
  20. 20.19 × 4 =
  21. 21.32 × 4 =
  22. 22.61 × 4 =
  23. 23.40 × 8 =
  24. 24.39 × 4 =
  25. 25.22 × 4 =
  26. 26.28 × 8 =
  27. 27.16 × 4 =
  28. 28.24 × 8 =
  29. 29.68 × 4 =
  30. 30.17 × 8 =
  31. 31.40 × 4 =
  32. 32.52 × 4 =
  33. 33.64 × 4 =
  34. 34.14 × 4 =
  35. 35.43 × 4 =
  36. 36.29 × 8 =
  37. 37.20 × 4 =
  38. 38.62 × 4 =
  39. 39.19 × 8 =
  40. 40.37 × 8 =

Answer key

  1. 216
  2. 312
  3. 292
  4. 228
  5. 104
  6. 200
  7. 68
  8. 124
  9. 288
  10. 224
  11. 168
  12. 112
  13. 96
  14. 280
  15. 144
  16. 264
  17. 272
  18. 48
  19. 144
  20. 76
  21. 128
  22. 244
  23. 320
  24. 156
  25. 88
  26. 224
  27. 64
  28. 192
  29. 272
  30. 136
  31. 160
  32. 208
  33. 256
  34. 56
  35. 172
  36. 232
  37. 80
  38. 248
  39. 152
  40. 296

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