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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 737 · 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 × 4 =
  2. 2.15 × 8 =
  3. 3.56 × 4 =
  4. 4.19 × 8 =
  5. 5.17 × 4 =
  6. 6.26 × 8 =
  7. 7.14 × 4 =
  8. 8.13 × 4 =
  9. 9.51 × 4 =
  10. 10.36 × 8 =
  11. 11.36 × 4 =
  12. 12.29 × 4 =
  13. 13.20 × 4 =
  14. 14.12 × 4 =
  15. 15.18 × 4 =
  16. 16.23 × 4 =
  17. 17.59 × 4 =
  18. 18.72 × 4 =
  19. 19.30 × 4 =
  20. 20.39 × 4 =
  21. 21.21 × 8 =
  22. 22.40 × 8 =
  23. 23.66 × 4 =
  24. 24.17 × 8 =
  25. 25.14 × 8 =
  26. 26.53 × 4 =
  27. 27.13 × 8 =
  28. 28.73 × 4 =
  29. 29.22 × 8 =
  30. 30.43 × 4 =
  31. 31.31 × 4 =
  32. 32.50 × 4 =
  33. 33.33 × 4 =
  34. 34.23 × 8 =
  35. 35.26 × 4 =
  36. 36.16 × 4 =
  37. 37.24 × 8 =
  38. 38.42 × 4 =
  39. 39.32 × 4 =
  40. 40.37 × 4 =

Answer key

  1. 96
  2. 120
  3. 224
  4. 152
  5. 68
  6. 208
  7. 56
  8. 52
  9. 204
  10. 288
  11. 144
  12. 116
  13. 80
  14. 48
  15. 72
  16. 92
  17. 236
  18. 288
  19. 120
  20. 156
  21. 168
  22. 320
  23. 264
  24. 136
  25. 112
  26. 212
  27. 104
  28. 292
  29. 176
  30. 172
  31. 124
  32. 200
  33. 132
  34. 184
  35. 104
  36. 64
  37. 192
  38. 168
  39. 128
  40. 148

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