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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 714 · 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. 1.51 × 4 =
  2. 2.12 × 4 =
  3. 3.26 × 4 =
  4. 4.31 × 4 =
  5. 5.59 × 4 =
  6. 6.49 × 4 =
  7. 7.38 × 8 =
  8. 8.21 × 8 =
  9. 9.54 × 4 =
  10. 10.70 × 4 =
  11. 11.41 × 4 =
  12. 12.50 × 4 =
  13. 13.62 × 4 =
  14. 14.18 × 4 =
  15. 15.30 × 4 =
  16. 16.24 × 8 =
  17. 17.28 × 8 =
  18. 18.25 × 8 =
  19. 19.32 × 8 =
  20. 20.36 × 4 =
  21. 21.36 × 8 =
  22. 22.15 × 8 =
  23. 23.72 × 4 =
  24. 24.13 × 4 =
  25. 25.64 × 4 =
  26. 26.61 × 4 =
  27. 27.52 × 4 =
  28. 28.27 × 8 =
  29. 29.22 × 8 =
  30. 30.19 × 8 =
  31. 31.39 × 4 =
  32. 32.42 × 4 =
  33. 33.58 × 4 =
  34. 34.20 × 8 =
  35. 35.60 × 4 =
  36. 36.18 × 8 =
  37. 37.39 × 8 =
  38. 38.20 × 4 =
  39. 39.19 × 4 =
  40. 40.40 × 4 =

Answer key

  1. 204
  2. 48
  3. 104
  4. 124
  5. 236
  6. 196
  7. 304
  8. 168
  9. 216
  10. 280
  11. 164
  12. 200
  13. 248
  14. 72
  15. 120
  16. 192
  17. 224
  18. 200
  19. 256
  20. 144
  21. 288
  22. 120
  23. 288
  24. 52
  25. 256
  26. 244
  27. 208
  28. 216
  29. 176
  30. 152
  31. 156
  32. 168
  33. 232
  34. 160
  35. 240
  36. 144
  37. 312
  38. 80
  39. 76
  40. 160

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