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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 162 · 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. 1.72 × 4 =
  2. 2.46 × 4 =
  3. 3.41 × 4 =
  4. 4.30 × 8 =
  5. 5.73 × 4 =
  6. 6.22 × 8 =
  7. 7.13 × 8 =
  8. 8.64 × 4 =
  9. 9.20 × 8 =
  10. 10.55 × 4 =
  11. 11.21 × 8 =
  12. 12.31 × 8 =
  13. 13.24 × 8 =
  14. 14.25 × 8 =
  15. 15.33 × 4 =
  16. 16.19 × 8 =
  17. 17.17 × 4 =
  18. 18.18 × 8 =
  19. 19.51 × 4 =
  20. 20.15 × 8 =
  21. 21.29 × 8 =
  22. 22.37 × 4 =
  23. 23.26 × 4 =
  24. 24.12 × 4 =
  25. 25.27 × 8 =
  26. 26.12 × 8 =
  27. 27.34 × 8 =
  28. 28.40 × 4 =
  29. 29.54 × 4 =
  30. 30.22 × 4 =
  31. 31.23 × 8 =
  32. 32.27 × 4 =
  33. 33.18 × 4 =
  34. 34.60 × 4 =
  35. 35.58 × 4 =
  36. 36.25 × 4 =
  37. 37.20 × 4 =
  38. 38.49 × 4 =
  39. 39.53 × 4 =
  40. 40.24 × 4 =

Answer key

  1. 288
  2. 184
  3. 164
  4. 240
  5. 292
  6. 176
  7. 104
  8. 256
  9. 160
  10. 220
  11. 168
  12. 248
  13. 192
  14. 200
  15. 132
  16. 152
  17. 68
  18. 144
  19. 204
  20. 120
  21. 232
  22. 148
  23. 104
  24. 48
  25. 216
  26. 96
  27. 272
  28. 160
  29. 216
  30. 88
  31. 184
  32. 108
  33. 72
  34. 240
  35. 232
  36. 100
  37. 80
  38. 196
  39. 212
  40. 96

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