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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 62 · 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. 1.15 × 8 =
  2. 2.35 × 8 =
  3. 3.34 × 4 =
  4. 4.31 × 8 =
  5. 5.25 × 8 =
  6. 6.22 × 8 =
  7. 7.65 × 4 =
  8. 8.21 × 4 =
  9. 9.21 × 8 =
  10. 10.66 × 4 =
  11. 11.70 × 4 =
  12. 12.19 × 8 =
  13. 13.14 × 4 =
  14. 14.61 × 4 =
  15. 15.32 × 8 =
  16. 16.39 × 8 =
  17. 17.22 × 4 =
  18. 18.30 × 8 =
  19. 19.58 × 4 =
  20. 20.44 × 4 =
  21. 21.40 × 4 =
  22. 22.29 × 8 =
  23. 23.73 × 4 =
  24. 24.35 × 4 =
  25. 25.23 × 4 =
  26. 26.62 × 4 =
  27. 27.28 × 8 =
  28. 28.40 × 8 =
  29. 29.36 × 4 =
  30. 30.19 × 4 =
  31. 31.18 × 8 =
  32. 32.16 × 8 =
  33. 33.34 × 8 =
  34. 34.17 × 8 =
  35. 35.27 × 8 =
  36. 36.39 × 4 =
  37. 37.13 × 8 =
  38. 38.50 × 4 =
  39. 39.24 × 4 =
  40. 40.60 × 4 =

Answer key

  1. 120
  2. 280
  3. 136
  4. 248
  5. 200
  6. 176
  7. 260
  8. 84
  9. 168
  10. 264
  11. 280
  12. 152
  13. 56
  14. 244
  15. 256
  16. 312
  17. 88
  18. 240
  19. 232
  20. 176
  21. 160
  22. 232
  23. 292
  24. 140
  25. 92
  26. 248
  27. 224
  28. 320
  29. 144
  30. 76
  31. 144
  32. 128
  33. 272
  34. 136
  35. 216
  36. 156
  37. 104
  38. 200
  39. 96
  40. 240

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