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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 263 · 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. 1.39 × 8 =
  2. 2.60 × 4 =
  3. 3.37 × 8 =
  4. 4.34 × 8 =
  5. 5.67 × 4 =
  6. 6.31 × 4 =
  7. 7.30 × 8 =
  8. 8.16 × 4 =
  9. 9.17 × 4 =
  10. 10.35 × 8 =
  11. 11.27 × 8 =
  12. 12.34 × 4 =
  13. 13.41 × 4 =
  14. 14.36 × 8 =
  15. 15.28 × 8 =
  16. 16.35 × 4 =
  17. 17.38 × 8 =
  18. 18.23 × 8 =
  19. 19.66 × 4 =
  20. 20.45 × 4 =
  21. 21.24 × 4 =
  22. 22.56 × 4 =
  23. 23.18 × 8 =
  24. 24.70 × 4 =
  25. 25.24 × 8 =
  26. 26.33 × 4 =
  27. 27.61 × 4 =
  28. 28.20 × 8 =
  29. 29.49 × 4 =
  30. 30.15 × 8 =
  31. 31.20 × 4 =
  32. 32.14 × 8 =
  33. 33.30 × 4 =
  34. 34.32 × 4 =
  35. 35.17 × 8 =
  36. 36.19 × 4 =
  37. 37.14 × 4 =
  38. 38.29 × 4 =
  39. 39.51 × 4 =
  40. 40.25 × 4 =

Answer key

  1. 312
  2. 240
  3. 296
  4. 272
  5. 268
  6. 124
  7. 240
  8. 64
  9. 68
  10. 280
  11. 216
  12. 136
  13. 164
  14. 288
  15. 224
  16. 140
  17. 304
  18. 184
  19. 264
  20. 180
  21. 96
  22. 224
  23. 144
  24. 280
  25. 192
  26. 132
  27. 244
  28. 160
  29. 196
  30. 120
  31. 80
  32. 112
  33. 120
  34. 128
  35. 136
  36. 76
  37. 56
  38. 116
  39. 204
  40. 100

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