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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 860 · 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. 1.24 × 8 =
  2. 2.26 × 8 =
  3. 3.40 × 4 =
  4. 4.23 × 8 =
  5. 5.31 × 4 =
  6. 6.19 × 8 =
  7. 7.12 × 8 =
  8. 8.29 × 8 =
  9. 9.25 × 4 =
  10. 10.37 × 8 =
  11. 11.20 × 8 =
  12. 12.26 × 4 =
  13. 13.57 × 4 =
  14. 14.34 × 8 =
  15. 15.17 × 4 =
  16. 16.69 × 4 =
  17. 17.15 × 4 =
  18. 18.23 × 4 =
  19. 19.53 × 4 =
  20. 20.58 × 4 =
  21. 21.21 × 4 =
  22. 22.17 × 8 =
  23. 23.68 × 4 =
  24. 24.19 × 4 =
  25. 25.12 × 4 =
  26. 26.30 × 8 =
  27. 27.38 × 8 =
  28. 28.22 × 4 =
  29. 29.41 × 4 =
  30. 30.36 × 8 =
  31. 31.74 × 4 =
  32. 32.14 × 8 =
  33. 33.31 × 8 =
  34. 34.16 × 8 =
  35. 35.16 × 4 =
  36. 36.28 × 8 =
  37. 37.45 × 4 =
  38. 38.14 × 4 =
  39. 39.38 × 4 =
  40. 40.24 × 4 =

Answer key

  1. 192
  2. 208
  3. 160
  4. 184
  5. 124
  6. 152
  7. 96
  8. 232
  9. 100
  10. 296
  11. 160
  12. 104
  13. 228
  14. 272
  15. 68
  16. 276
  17. 60
  18. 92
  19. 212
  20. 232
  21. 84
  22. 136
  23. 272
  24. 76
  25. 48
  26. 240
  27. 304
  28. 88
  29. 164
  30. 288
  31. 296
  32. 112
  33. 248
  34. 128
  35. 64
  36. 224
  37. 180
  38. 56
  39. 152
  40. 96

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