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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 710 · 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. 1.26 × 8 =
  2. 2.36 × 4 =
  3. 3.75 × 4 =
  4. 4.46 × 4 =
  5. 5.35 × 4 =
  6. 6.12 × 8 =
  7. 7.44 × 4 =
  8. 8.21 × 4 =
  9. 9.14 × 8 =
  10. 10.20 × 4 =
  11. 11.45 × 4 =
  12. 12.35 × 8 =
  13. 13.62 × 4 =
  14. 14.25 × 8 =
  15. 15.60 × 4 =
  16. 16.64 × 4 =
  17. 17.19 × 4 =
  18. 18.15 × 8 =
  19. 19.40 × 8 =
  20. 20.74 × 4 =
  21. 21.39 × 8 =
  22. 22.69 × 4 =
  23. 23.28 × 8 =
  24. 24.37 × 4 =
  25. 25.61 × 4 =
  26. 26.38 × 4 =
  27. 27.72 × 4 =
  28. 28.13 × 8 =
  29. 29.25 × 4 =
  30. 30.31 × 8 =
  31. 31.55 × 4 =
  32. 32.15 × 4 =
  33. 33.39 × 4 =
  34. 34.30 × 8 =
  35. 35.73 × 4 =
  36. 36.47 × 4 =
  37. 37.30 × 4 =
  38. 38.42 × 4 =
  39. 39.29 × 8 =
  40. 40.17 × 8 =

Answer key

  1. 208
  2. 144
  3. 300
  4. 184
  5. 140
  6. 96
  7. 176
  8. 84
  9. 112
  10. 80
  11. 180
  12. 280
  13. 248
  14. 200
  15. 240
  16. 256
  17. 76
  18. 120
  19. 320
  20. 296
  21. 312
  22. 276
  23. 224
  24. 148
  25. 244
  26. 152
  27. 288
  28. 104
  29. 100
  30. 248
  31. 220
  32. 60
  33. 156
  34. 240
  35. 292
  36. 188
  37. 120
  38. 168
  39. 232
  40. 136

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