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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 848 · 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. 1.26 × 4 =
  2. 2.31 × 8 =
  3. 3.67 × 4 =
  4. 4.36 × 8 =
  5. 5.33 × 4 =
  6. 6.19 × 4 =
  7. 7.13 × 8 =
  8. 8.38 × 8 =
  9. 9.53 × 4 =
  10. 10.60 × 4 =
  11. 11.30 × 8 =
  12. 12.14 × 8 =
  13. 13.26 × 8 =
  14. 14.14 × 4 =
  15. 15.58 × 4 =
  16. 16.41 × 4 =
  17. 17.46 × 4 =
  18. 18.50 × 4 =
  19. 19.64 × 4 =
  20. 20.34 × 8 =
  21. 21.23 × 8 =
  22. 22.16 × 8 =
  23. 23.63 × 4 =
  24. 24.16 × 4 =
  25. 25.28 × 8 =
  26. 26.52 × 4 =
  27. 27.12 × 8 =
  28. 28.17 × 4 =
  29. 29.34 × 4 =
  30. 30.32 × 8 =
  31. 31.25 × 8 =
  32. 32.22 × 8 =
  33. 33.21 × 4 =
  34. 34.32 × 4 =
  35. 35.21 × 8 =
  36. 36.25 × 4 =
  37. 37.74 × 4 =
  38. 38.42 × 4 =
  39. 39.19 × 8 =
  40. 40.68 × 4 =

Answer key

  1. 104
  2. 248
  3. 268
  4. 288
  5. 132
  6. 76
  7. 104
  8. 304
  9. 212
  10. 240
  11. 240
  12. 112
  13. 208
  14. 56
  15. 232
  16. 164
  17. 184
  18. 200
  19. 256
  20. 272
  21. 184
  22. 128
  23. 252
  24. 64
  25. 224
  26. 208
  27. 96
  28. 68
  29. 136
  30. 256
  31. 200
  32. 176
  33. 84
  34. 128
  35. 168
  36. 100
  37. 296
  38. 168
  39. 152
  40. 272

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