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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 719 · 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. 1.24 × 4 =
  2. 2.25 × 8 =
  3. 3.67 × 4 =
  4. 4.44 × 4 =
  5. 5.72 × 4 =
  6. 6.66 × 4 =
  7. 7.20 × 8 =
  8. 8.18 × 4 =
  9. 9.15 × 4 =
  10. 10.21 × 8 =
  11. 11.50 × 4 =
  12. 12.19 × 8 =
  13. 13.37 × 4 =
  14. 14.20 × 4 =
  15. 15.36 × 8 =
  16. 16.13 × 8 =
  17. 17.45 × 4 =
  18. 18.57 × 4 =
  19. 19.16 × 4 =
  20. 20.74 × 4 =
  21. 21.34 × 4 =
  22. 22.32 × 8 =
  23. 23.22 × 8 =
  24. 24.39 × 8 =
  25. 25.42 × 4 =
  26. 26.40 × 8 =
  27. 27.62 × 4 =
  28. 28.30 × 4 =
  29. 29.21 × 4 =
  30. 30.29 × 8 =
  31. 31.71 × 4 =
  32. 32.33 × 4 =
  33. 33.33 × 8 =
  34. 34.24 × 8 =
  35. 35.22 × 4 =
  36. 36.12 × 4 =
  37. 37.36 × 4 =
  38. 38.15 × 8 =
  39. 39.14 × 8 =
  40. 40.28 × 4 =

Answer key

  1. 96
  2. 200
  3. 268
  4. 176
  5. 288
  6. 264
  7. 160
  8. 72
  9. 60
  10. 168
  11. 200
  12. 152
  13. 148
  14. 80
  15. 288
  16. 104
  17. 180
  18. 228
  19. 64
  20. 296
  21. 136
  22. 256
  23. 176
  24. 312
  25. 168
  26. 320
  27. 248
  28. 120
  29. 84
  30. 232
  31. 284
  32. 132
  33. 264
  34. 192
  35. 88
  36. 48
  37. 144
  38. 120
  39. 112
  40. 112

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