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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 83 · 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. 1.56 × 4 =
  2. 2.13 × 4 =
  3. 3.32 × 8 =
  4. 4.30 × 8 =
  5. 5.24 × 4 =
  6. 6.33 × 8 =
  7. 7.42 × 4 =
  8. 8.27 × 4 =
  9. 9.63 × 4 =
  10. 10.75 × 4 =
  11. 11.17 × 8 =
  12. 12.23 × 4 =
  13. 13.20 × 4 =
  14. 14.40 × 4 =
  15. 15.47 × 4 =
  16. 16.25 × 4 =
  17. 17.55 × 4 =
  18. 18.62 × 4 =
  19. 19.21 × 4 =
  20. 20.57 × 4 =
  21. 21.16 × 8 =
  22. 22.43 × 4 =
  23. 23.15 × 8 =
  24. 24.51 × 4 =
  25. 25.24 × 8 =
  26. 26.39 × 8 =
  27. 27.30 × 4 =
  28. 28.29 × 8 =
  29. 29.14 × 4 =
  30. 30.36 × 8 =
  31. 31.35 × 8 =
  32. 32.32 × 4 =
  33. 33.35 × 4 =
  34. 34.18 × 8 =
  35. 35.26 × 8 =
  36. 36.68 × 4 =
  37. 37.22 × 8 =
  38. 38.52 × 4 =
  39. 39.37 × 8 =
  40. 40.18 × 4 =

Answer key

  1. 224
  2. 52
  3. 256
  4. 240
  5. 96
  6. 264
  7. 168
  8. 108
  9. 252
  10. 300
  11. 136
  12. 92
  13. 80
  14. 160
  15. 188
  16. 100
  17. 220
  18. 248
  19. 84
  20. 228
  21. 128
  22. 172
  23. 120
  24. 204
  25. 192
  26. 312
  27. 120
  28. 232
  29. 56
  30. 288
  31. 280
  32. 128
  33. 140
  34. 144
  35. 208
  36. 272
  37. 176
  38. 208
  39. 296
  40. 72

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