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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 505 · 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. 1.58 × 4 =
  2. 2.49 × 4 =
  3. 3.31 × 8 =
  4. 4.17 × 8 =
  5. 5.13 × 8 =
  6. 6.19 × 4 =
  7. 7.30 × 4 =
  8. 8.70 × 4 =
  9. 9.54 × 4 =
  10. 10.35 × 8 =
  11. 11.64 × 4 =
  12. 12.18 × 8 =
  13. 13.34 × 4 =
  14. 14.14 × 8 =
  15. 15.41 × 4 =
  16. 16.21 × 8 =
  17. 17.22 × 4 =
  18. 18.61 × 4 =
  19. 19.27 × 8 =
  20. 20.22 × 8 =
  21. 21.27 × 4 =
  22. 22.36 × 8 =
  23. 23.16 × 8 =
  24. 24.57 × 4 =
  25. 25.24 × 8 =
  26. 26.37 × 4 =
  27. 27.18 × 4 =
  28. 28.50 × 4 =
  29. 29.16 × 4 =
  30. 30.30 × 8 =
  31. 31.44 × 4 =
  32. 32.32 × 8 =
  33. 33.48 × 4 =
  34. 34.36 × 4 =
  35. 35.68 × 4 =
  36. 36.42 × 4 =
  37. 37.23 × 4 =
  38. 38.39 × 8 =
  39. 39.38 × 8 =
  40. 40.74 × 4 =

Answer key

  1. 232
  2. 196
  3. 248
  4. 136
  5. 104
  6. 76
  7. 120
  8. 280
  9. 216
  10. 280
  11. 256
  12. 144
  13. 136
  14. 112
  15. 164
  16. 168
  17. 88
  18. 244
  19. 216
  20. 176
  21. 108
  22. 288
  23. 128
  24. 228
  25. 192
  26. 148
  27. 72
  28. 200
  29. 64
  30. 240
  31. 176
  32. 256
  33. 192
  34. 144
  35. 272
  36. 168
  37. 92
  38. 312
  39. 304
  40. 296

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