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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 104 · 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. 1.28 × 4 =
  2. 2.20 × 4 =
  3. 3.23 × 8 =
  4. 4.24 × 8 =
  5. 5.33 × 8 =
  6. 6.16 × 8 =
  7. 7.25 × 8 =
  8. 8.35 × 8 =
  9. 9.61 × 4 =
  10. 10.18 × 8 =
  11. 11.68 × 4 =
  12. 12.14 × 4 =
  13. 13.58 × 4 =
  14. 14.34 × 4 =
  15. 15.39 × 8 =
  16. 16.60 × 4 =
  17. 17.14 × 8 =
  18. 18.24 × 4 =
  19. 19.51 × 4 =
  20. 20.55 × 4 =
  21. 21.13 × 4 =
  22. 22.44 × 4 =
  23. 23.41 × 4 =
  24. 24.19 × 4 =
  25. 25.15 × 8 =
  26. 26.47 × 4 =
  27. 27.17 × 8 =
  28. 28.40 × 4 =
  29. 29.18 × 4 =
  30. 30.40 × 8 =
  31. 31.67 × 4 =
  32. 32.23 × 4 =
  33. 33.43 × 4 =
  34. 34.70 × 4 =
  35. 35.16 × 4 =
  36. 36.13 × 8 =
  37. 37.21 × 4 =
  38. 38.31 × 8 =
  39. 39.32 × 8 =
  40. 40.28 × 8 =

Answer key

  1. 112
  2. 80
  3. 184
  4. 192
  5. 264
  6. 128
  7. 200
  8. 280
  9. 244
  10. 144
  11. 272
  12. 56
  13. 232
  14. 136
  15. 312
  16. 240
  17. 112
  18. 96
  19. 204
  20. 220
  21. 52
  22. 176
  23. 164
  24. 76
  25. 120
  26. 188
  27. 136
  28. 160
  29. 72
  30. 320
  31. 268
  32. 92
  33. 172
  34. 280
  35. 64
  36. 104
  37. 84
  38. 248
  39. 256
  40. 224

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