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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 282 · 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. 1.22 × 8 =
  2. 2.59 × 4 =
  3. 3.41 × 4 =
  4. 4.24 × 4 =
  5. 5.28 × 8 =
  6. 6.32 × 4 =
  7. 7.39 × 4 =
  8. 8.64 × 4 =
  9. 9.46 × 4 =
  10. 10.12 × 4 =
  11. 11.50 × 4 =
  12. 12.36 × 8 =
  13. 13.20 × 4 =
  14. 14.21 × 8 =
  15. 15.72 × 4 =
  16. 16.60 × 4 =
  17. 17.23 × 8 =
  18. 18.30 × 8 =
  19. 19.35 × 4 =
  20. 20.25 × 8 =
  21. 21.66 × 4 =
  22. 22.29 × 8 =
  23. 23.33 × 4 =
  24. 24.55 × 4 =
  25. 25.17 × 8 =
  26. 26.17 × 4 =
  27. 27.30 × 4 =
  28. 28.26 × 8 =
  29. 29.35 × 8 =
  30. 30.36 × 4 =
  31. 31.16 × 8 =
  32. 32.38 × 8 =
  33. 33.38 × 4 =
  34. 34.75 × 4 =
  35. 35.15 × 8 =
  36. 36.19 × 4 =
  37. 37.22 × 4 =
  38. 38.37 × 8 =
  39. 39.39 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 176
  2. 236
  3. 164
  4. 96
  5. 224
  6. 128
  7. 156
  8. 256
  9. 184
  10. 48
  11. 200
  12. 288
  13. 80
  14. 168
  15. 288
  16. 240
  17. 184
  18. 240
  19. 140
  20. 200
  21. 264
  22. 232
  23. 132
  24. 220
  25. 136
  26. 68
  27. 120
  28. 208
  29. 280
  30. 144
  31. 128
  32. 304
  33. 152
  34. 300
  35. 120
  36. 76
  37. 88
  38. 296
  39. 312
  40. 160

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