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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 287 · 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. 1.25 × 8 =
  2. 2.47 × 4 =
  3. 3.65 × 4 =
  4. 4.24 × 8 =
  5. 5.58 × 4 =
  6. 6.18 × 4 =
  7. 7.55 × 4 =
  8. 8.28 × 8 =
  9. 9.23 × 4 =
  10. 10.48 × 4 =
  11. 11.12 × 8 =
  12. 12.35 × 8 =
  13. 13.32 × 4 =
  14. 14.15 × 4 =
  15. 15.31 × 8 =
  16. 16.17 × 4 =
  17. 17.24 × 4 =
  18. 18.31 × 4 =
  19. 19.16 × 4 =
  20. 20.32 × 8 =
  21. 21.43 × 4 =
  22. 22.38 × 4 =
  23. 23.23 × 8 =
  24. 24.27 × 4 =
  25. 25.20 × 8 =
  26. 26.39 × 8 =
  27. 27.14 × 8 =
  28. 28.40 × 4 =
  29. 29.30 × 4 =
  30. 30.61 × 4 =
  31. 31.50 × 4 =
  32. 32.17 × 8 =
  33. 33.36 × 4 =
  34. 34.29 × 8 =
  35. 35.60 × 4 =
  36. 36.34 × 8 =
  37. 37.26 × 8 =
  38. 38.35 × 4 =
  39. 39.13 × 8 =
  40. 40.22 × 4 =

Answer key

  1. 200
  2. 188
  3. 260
  4. 192
  5. 232
  6. 72
  7. 220
  8. 224
  9. 92
  10. 192
  11. 96
  12. 280
  13. 128
  14. 60
  15. 248
  16. 68
  17. 96
  18. 124
  19. 64
  20. 256
  21. 172
  22. 152
  23. 184
  24. 108
  25. 160
  26. 312
  27. 112
  28. 160
  29. 120
  30. 244
  31. 200
  32. 136
  33. 144
  34. 232
  35. 240
  36. 272
  37. 208
  38. 140
  39. 104
  40. 88

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