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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 574 · 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. 1.37 × 8 =
  2. 2.46 × 4 =
  3. 3.18 × 4 =
  4. 4.19 × 8 =
  5. 5.13 × 8 =
  6. 6.42 × 4 =
  7. 7.28 × 8 =
  8. 8.22 × 8 =
  9. 9.34 × 8 =
  10. 10.36 × 8 =
  11. 11.41 × 4 =
  12. 12.21 × 4 =
  13. 13.61 × 4 =
  14. 14.68 × 4 =
  15. 15.12 × 8 =
  16. 16.26 × 8 =
  17. 17.47 × 4 =
  18. 18.29 × 8 =
  19. 19.39 × 4 =
  20. 20.44 × 4 =
  21. 21.49 × 4 =
  22. 22.35 × 8 =
  23. 23.67 × 4 =
  24. 24.22 × 4 =
  25. 25.17 × 4 =
  26. 26.30 × 8 =
  27. 27.72 × 4 =
  28. 28.16 × 4 =
  29. 29.14 × 4 =
  30. 30.32 × 8 =
  31. 31.18 × 8 =
  32. 32.17 × 8 =
  33. 33.21 × 8 =
  34. 34.26 × 4 =
  35. 35.14 × 8 =
  36. 36.27 × 4 =
  37. 37.39 × 8 =
  38. 38.74 × 4 =
  39. 39.24 × 8 =
  40. 40.19 × 4 =

Answer key

  1. 296
  2. 184
  3. 72
  4. 152
  5. 104
  6. 168
  7. 224
  8. 176
  9. 272
  10. 288
  11. 164
  12. 84
  13. 244
  14. 272
  15. 96
  16. 208
  17. 188
  18. 232
  19. 156
  20. 176
  21. 196
  22. 280
  23. 268
  24. 88
  25. 68
  26. 240
  27. 288
  28. 64
  29. 56
  30. 256
  31. 144
  32. 136
  33. 168
  34. 104
  35. 112
  36. 108
  37. 312
  38. 296
  39. 192
  40. 76

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