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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 112 · 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. 1.12 × 8 =
  2. 2.24 × 8 =
  3. 3.75 × 4 =
  4. 4.37 × 4 =
  5. 5.74 × 4 =
  6. 6.16 × 4 =
  7. 7.17 × 4 =
  8. 8.32 × 8 =
  9. 9.34 × 4 =
  10. 10.20 × 4 =
  11. 11.17 × 8 =
  12. 12.36 × 4 =
  13. 13.36 × 8 =
  14. 14.58 × 4 =
  15. 15.37 × 8 =
  16. 16.20 × 8 =
  17. 17.40 × 8 =
  18. 18.31 × 8 =
  19. 19.62 × 4 =
  20. 20.26 × 8 =
  21. 21.48 × 4 =
  22. 22.21 × 8 =
  23. 23.41 × 4 =
  24. 24.18 × 4 =
  25. 25.42 × 4 =
  26. 26.29 × 8 =
  27. 27.69 × 4 =
  28. 28.50 × 4 =
  29. 29.13 × 8 =
  30. 30.51 × 4 =
  31. 31.60 × 4 =
  32. 32.25 × 8 =
  33. 33.19 × 4 =
  34. 34.67 × 4 =
  35. 35.55 × 4 =
  36. 36.27 × 8 =
  37. 37.35 × 4 =
  38. 38.15 × 4 =
  39. 39.65 × 4 =
  40. 40.46 × 4 =

Answer key

  1. 96
  2. 192
  3. 300
  4. 148
  5. 296
  6. 64
  7. 68
  8. 256
  9. 136
  10. 80
  11. 136
  12. 144
  13. 288
  14. 232
  15. 296
  16. 160
  17. 320
  18. 248
  19. 248
  20. 208
  21. 192
  22. 168
  23. 164
  24. 72
  25. 168
  26. 232
  27. 276
  28. 200
  29. 104
  30. 204
  31. 240
  32. 200
  33. 76
  34. 268
  35. 220
  36. 216
  37. 140
  38. 60
  39. 260
  40. 184

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