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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 742 · 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. 1.52 × 4 =
  2. 2.59 × 4 =
  3. 3.15 × 4 =
  4. 4.33 × 8 =
  5. 5.21 × 8 =
  6. 6.14 × 8 =
  7. 7.44 × 4 =
  8. 8.17 × 8 =
  9. 9.24 × 8 =
  10. 10.32 × 4 =
  11. 11.62 × 4 =
  12. 12.19 × 4 =
  13. 13.36 × 8 =
  14. 14.41 × 4 =
  15. 15.31 × 8 =
  16. 16.33 × 4 =
  17. 17.26 × 4 =
  18. 18.75 × 4 =
  19. 19.38 × 4 =
  20. 20.74 × 4 =
  21. 21.16 × 4 =
  22. 22.32 × 8 =
  23. 23.56 × 4 =
  24. 24.31 × 4 =
  25. 25.51 × 4 =
  26. 26.57 × 4 =
  27. 27.18 × 8 =
  28. 28.13 × 4 =
  29. 29.27 × 8 =
  30. 30.21 × 4 =
  31. 31.20 × 8 =
  32. 32.46 × 4 =
  33. 33.30 × 4 =
  34. 34.19 × 8 =
  35. 35.25 × 8 =
  36. 36.27 × 4 =
  37. 37.28 × 8 =
  38. 38.17 × 4 =
  39. 39.50 × 4 =
  40. 40.45 × 4 =

Answer key

  1. 208
  2. 236
  3. 60
  4. 264
  5. 168
  6. 112
  7. 176
  8. 136
  9. 192
  10. 128
  11. 248
  12. 76
  13. 288
  14. 164
  15. 248
  16. 132
  17. 104
  18. 300
  19. 152
  20. 296
  21. 64
  22. 256
  23. 224
  24. 124
  25. 204
  26. 228
  27. 144
  28. 52
  29. 216
  30. 84
  31. 160
  32. 184
  33. 120
  34. 152
  35. 200
  36. 108
  37. 224
  38. 68
  39. 200
  40. 180

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