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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 153 · 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. 1.53 × 4 =
  2. 2.17 × 4 =
  3. 3.22 × 8 =
  4. 4.20 × 8 =
  5. 5.41 × 4 =
  6. 6.21 × 8 =
  7. 7.37 × 8 =
  8. 8.29 × 8 =
  9. 9.12 × 8 =
  10. 10.72 × 4 =
  11. 11.13 × 8 =
  12. 12.25 × 8 =
  13. 13.16 × 4 =
  14. 14.44 × 4 =
  15. 15.37 × 4 =
  16. 16.18 × 4 =
  17. 17.32 × 8 =
  18. 18.34 × 8 =
  19. 19.29 × 4 =
  20. 20.14 × 8 =
  21. 21.21 × 4 =
  22. 22.39 × 8 =
  23. 23.15 × 8 =
  24. 24.16 × 8 =
  25. 25.59 × 4 =
  26. 26.18 × 8 =
  27. 27.19 × 8 =
  28. 28.20 × 4 =
  29. 29.45 × 4 =
  30. 30.19 × 4 =
  31. 31.34 × 4 =
  32. 32.26 × 8 =
  33. 33.38 × 8 =
  34. 34.64 × 4 =
  35. 35.28 × 8 =
  36. 36.69 × 4 =
  37. 37.13 × 4 =
  38. 38.39 × 4 =
  39. 39.62 × 4 =
  40. 40.52 × 4 =

Answer key

  1. 212
  2. 68
  3. 176
  4. 160
  5. 164
  6. 168
  7. 296
  8. 232
  9. 96
  10. 288
  11. 104
  12. 200
  13. 64
  14. 176
  15. 148
  16. 72
  17. 256
  18. 272
  19. 116
  20. 112
  21. 84
  22. 312
  23. 120
  24. 128
  25. 236
  26. 144
  27. 152
  28. 80
  29. 180
  30. 76
  31. 136
  32. 208
  33. 304
  34. 256
  35. 224
  36. 276
  37. 52
  38. 156
  39. 248
  40. 208

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