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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 176 · 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. 1.35 × 8 =
  2. 2.15 × 8 =
  3. 3.33 × 4 =
  4. 4.29 × 8 =
  5. 5.30 × 4 =
  6. 6.15 × 4 =
  7. 7.42 × 4 =
  8. 8.73 × 4 =
  9. 9.38 × 4 =
  10. 10.26 × 8 =
  11. 11.19 × 4 =
  12. 12.58 × 4 =
  13. 13.35 × 4 =
  14. 14.56 × 4 =
  15. 15.38 × 8 =
  16. 16.24 × 8 =
  17. 17.34 × 8 =
  18. 18.14 × 8 =
  19. 19.40 × 4 =
  20. 20.36 × 4 =
  21. 21.28 × 4 =
  22. 22.24 × 4 =
  23. 23.16 × 4 =
  24. 24.54 × 4 =
  25. 25.40 × 8 =
  26. 26.32 × 8 =
  27. 27.25 × 8 =
  28. 28.22 × 4 =
  29. 29.13 × 8 =
  30. 30.41 × 4 =
  31. 31.28 × 8 =
  32. 32.18 × 4 =
  33. 33.52 × 4 =
  34. 34.26 × 4 =
  35. 35.57 × 4 =
  36. 36.68 × 4 =
  37. 37.32 × 4 =
  38. 38.30 × 8 =
  39. 39.23 × 8 =
  40. 40.62 × 4 =

Answer key

  1. 280
  2. 120
  3. 132
  4. 232
  5. 120
  6. 60
  7. 168
  8. 292
  9. 152
  10. 208
  11. 76
  12. 232
  13. 140
  14. 224
  15. 304
  16. 192
  17. 272
  18. 112
  19. 160
  20. 144
  21. 112
  22. 96
  23. 64
  24. 216
  25. 320
  26. 256
  27. 200
  28. 88
  29. 104
  30. 164
  31. 224
  32. 72
  33. 208
  34. 104
  35. 228
  36. 272
  37. 128
  38. 240
  39. 184
  40. 248

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