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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 636 · 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. 1.61 × 4 =
  2. 2.13 × 4 =
  3. 3.73 × 4 =
  4. 4.16 × 8 =
  5. 5.55 × 4 =
  6. 6.64 × 4 =
  7. 7.35 × 4 =
  8. 8.38 × 4 =
  9. 9.60 × 4 =
  10. 10.13 × 8 =
  11. 11.23 × 4 =
  12. 12.20 × 8 =
  13. 13.30 × 4 =
  14. 14.19 × 4 =
  15. 15.45 × 4 =
  16. 16.39 × 8 =
  17. 17.26 × 4 =
  18. 18.51 × 4 =
  19. 19.12 × 4 =
  20. 20.39 × 4 =
  21. 21.50 × 4 =
  22. 22.23 × 8 =
  23. 23.54 × 4 =
  24. 24.12 × 8 =
  25. 25.48 × 4 =
  26. 26.38 × 8 =
  27. 27.31 × 4 =
  28. 28.36 × 8 =
  29. 29.24 × 8 =
  30. 30.26 × 8 =
  31. 31.69 × 4 =
  32. 32.20 × 4 =
  33. 33.32 × 4 =
  34. 34.46 × 4 =
  35. 35.14 × 4 =
  36. 36.22 × 8 =
  37. 37.22 × 4 =
  38. 38.57 × 4 =
  39. 39.33 × 4 =
  40. 40.65 × 4 =

Answer key

  1. 244
  2. 52
  3. 292
  4. 128
  5. 220
  6. 256
  7. 140
  8. 152
  9. 240
  10. 104
  11. 92
  12. 160
  13. 120
  14. 76
  15. 180
  16. 312
  17. 104
  18. 204
  19. 48
  20. 156
  21. 200
  22. 184
  23. 216
  24. 96
  25. 192
  26. 304
  27. 124
  28. 288
  29. 192
  30. 208
  31. 276
  32. 80
  33. 128
  34. 184
  35. 56
  36. 176
  37. 88
  38. 228
  39. 132
  40. 260

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