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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 440 · 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. 1.27 × 8 =
  2. 2.26 × 4 =
  3. 3.36 × 8 =
  4. 4.16 × 8 =
  5. 5.13 × 8 =
  6. 6.73 × 4 =
  7. 7.29 × 4 =
  8. 8.47 × 4 =
  9. 9.12 × 8 =
  10. 10.22 × 4 =
  11. 11.21 × 8 =
  12. 12.60 × 4 =
  13. 13.21 × 4 =
  14. 14.35 × 8 =
  15. 15.23 × 8 =
  16. 16.68 × 4 =
  17. 17.18 × 8 =
  18. 18.25 × 8 =
  19. 19.52 × 4 =
  20. 20.53 × 4 =
  21. 21.31 × 4 =
  22. 22.70 × 4 =
  23. 23.46 × 4 =
  24. 24.26 × 8 =
  25. 25.65 × 4 =
  26. 26.17 × 4 =
  27. 27.32 × 4 =
  28. 28.39 × 4 =
  29. 29.50 × 4 =
  30. 30.33 × 4 =
  31. 31.29 × 8 =
  32. 32.22 × 8 =
  33. 33.69 × 4 =
  34. 34.14 × 4 =
  35. 35.57 × 4 =
  36. 36.34 × 8 =
  37. 37.17 × 8 =
  38. 38.58 × 4 =
  39. 39.16 × 4 =
  40. 40.27 × 4 =

Answer key

  1. 216
  2. 104
  3. 288
  4. 128
  5. 104
  6. 292
  7. 116
  8. 188
  9. 96
  10. 88
  11. 168
  12. 240
  13. 84
  14. 280
  15. 184
  16. 272
  17. 144
  18. 200
  19. 208
  20. 212
  21. 124
  22. 280
  23. 184
  24. 208
  25. 260
  26. 68
  27. 128
  28. 156
  29. 200
  30. 132
  31. 232
  32. 176
  33. 276
  34. 56
  35. 228
  36. 272
  37. 136
  38. 232
  39. 64
  40. 108

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