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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 622 · 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. 1.12 × 8 =
  2. 2.34 × 8 =
  3. 3.20 × 4 =
  4. 4.21 × 4 =
  5. 5.37 × 8 =
  6. 6.60 × 4 =
  7. 7.22 × 4 =
  8. 8.27 × 8 =
  9. 9.14 × 8 =
  10. 10.26 × 4 =
  11. 11.18 × 4 =
  12. 12.16 × 8 =
  13. 13.67 × 4 =
  14. 14.70 × 4 =
  15. 15.32 × 8 =
  16. 16.56 × 4 =
  17. 17.14 × 4 =
  18. 18.19 × 8 =
  19. 19.29 × 8 =
  20. 20.13 × 8 =
  21. 21.57 × 4 =
  22. 22.30 × 8 =
  23. 23.30 × 4 =
  24. 24.39 × 4 =
  25. 25.39 × 8 =
  26. 26.31 × 4 =
  27. 27.22 × 8 =
  28. 28.51 × 4 =
  29. 29.25 × 4 =
  30. 30.47 × 4 =
  31. 31.28 × 4 =
  32. 32.23 × 8 =
  33. 33.26 × 8 =
  34. 34.38 × 8 =
  35. 35.13 × 4 =
  36. 36.40 × 4 =
  37. 37.35 × 8 =
  38. 38.58 × 4 =
  39. 39.33 × 8 =
  40. 40.27 × 4 =

Answer key

  1. 96
  2. 272
  3. 80
  4. 84
  5. 296
  6. 240
  7. 88
  8. 216
  9. 112
  10. 104
  11. 72
  12. 128
  13. 268
  14. 280
  15. 256
  16. 224
  17. 56
  18. 152
  19. 232
  20. 104
  21. 228
  22. 240
  23. 120
  24. 156
  25. 312
  26. 124
  27. 176
  28. 204
  29. 100
  30. 188
  31. 112
  32. 184
  33. 208
  34. 304
  35. 52
  36. 160
  37. 280
  38. 232
  39. 264
  40. 108

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