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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 92 · 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. 1.22 × 4 =
  2. 2.40 × 8 =
  3. 3.19 × 8 =
  4. 4.33 × 8 =
  5. 5.38 × 8 =
  6. 6.18 × 8 =
  7. 7.37 × 4 =
  8. 8.12 × 8 =
  9. 9.29 × 8 =
  10. 10.23 × 8 =
  11. 11.51 × 4 =
  12. 12.24 × 8 =
  13. 13.27 × 4 =
  14. 14.36 × 4 =
  15. 15.32 × 8 =
  16. 16.30 × 8 =
  17. 17.15 × 4 =
  18. 18.45 × 4 =
  19. 19.20 × 4 =
  20. 20.28 × 8 =
  21. 21.21 × 8 =
  22. 22.19 × 4 =
  23. 23.50 × 4 =
  24. 24.14 × 4 =
  25. 25.26 × 4 =
  26. 26.62 × 4 =
  27. 27.14 × 8 =
  28. 28.13 × 8 =
  29. 29.74 × 4 =
  30. 30.54 × 4 =
  31. 31.37 × 8 =
  32. 32.65 × 4 =
  33. 33.15 × 8 =
  34. 34.39 × 4 =
  35. 35.58 × 4 =
  36. 36.25 × 4 =
  37. 37.23 × 4 =
  38. 38.53 × 4 =
  39. 39.35 × 8 =
  40. 40.36 × 8 =

Answer key

  1. 88
  2. 320
  3. 152
  4. 264
  5. 304
  6. 144
  7. 148
  8. 96
  9. 232
  10. 184
  11. 204
  12. 192
  13. 108
  14. 144
  15. 256
  16. 240
  17. 60
  18. 180
  19. 80
  20. 224
  21. 168
  22. 76
  23. 200
  24. 56
  25. 104
  26. 248
  27. 112
  28. 104
  29. 296
  30. 216
  31. 296
  32. 260
  33. 120
  34. 156
  35. 232
  36. 100
  37. 92
  38. 212
  39. 280
  40. 288

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