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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 195 · 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. 1.21 × 4 =
  2. 2.73 × 4 =
  3. 3.25 × 4 =
  4. 4.20 × 4 =
  5. 5.25 × 8 =
  6. 6.53 × 4 =
  7. 7.22 × 8 =
  8. 8.13 × 8 =
  9. 9.17 × 4 =
  10. 10.48 × 4 =
  11. 11.18 × 8 =
  12. 12.16 × 8 =
  13. 13.69 × 4 =
  14. 14.12 × 8 =
  15. 15.38 × 8 =
  16. 16.45 × 4 =
  17. 17.70 × 4 =
  18. 18.23 × 4 =
  19. 19.40 × 4 =
  20. 20.23 × 8 =
  21. 21.32 × 8 =
  22. 22.15 × 4 =
  23. 23.37 × 4 =
  24. 24.24 × 8 =
  25. 25.34 × 8 =
  26. 26.39 × 8 =
  27. 27.33 × 8 =
  28. 28.21 × 8 =
  29. 29.29 × 8 =
  30. 30.57 × 4 =
  31. 31.19 × 4 =
  32. 32.35 × 4 =
  33. 33.30 × 4 =
  34. 34.40 × 8 =
  35. 35.66 × 4 =
  36. 36.18 × 4 =
  37. 37.36 × 8 =
  38. 38.27 × 4 =
  39. 39.12 × 4 =
  40. 40.58 × 4 =

Answer key

  1. 84
  2. 292
  3. 100
  4. 80
  5. 200
  6. 212
  7. 176
  8. 104
  9. 68
  10. 192
  11. 144
  12. 128
  13. 276
  14. 96
  15. 304
  16. 180
  17. 280
  18. 92
  19. 160
  20. 184
  21. 256
  22. 60
  23. 148
  24. 192
  25. 272
  26. 312
  27. 264
  28. 168
  29. 232
  30. 228
  31. 76
  32. 140
  33. 120
  34. 320
  35. 264
  36. 72
  37. 288
  38. 108
  39. 48
  40. 232

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