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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 329 · 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 × 8 =
  2. 2.16 × 4 =
  3. 3.41 × 4 =
  4. 4.28 × 4 =
  5. 5.54 × 4 =
  6. 6.20 × 4 =
  7. 7.20 × 8 =
  8. 8.28 × 8 =
  9. 9.40 × 8 =
  10. 10.17 × 8 =
  11. 11.22 × 4 =
  12. 12.19 × 8 =
  13. 13.57 × 4 =
  14. 14.73 × 4 =
  15. 15.39 × 8 =
  16. 16.30 × 4 =
  17. 17.35 × 8 =
  18. 18.51 × 4 =
  19. 19.15 × 4 =
  20. 20.67 × 4 =
  21. 21.74 × 4 =
  22. 22.24 × 4 =
  23. 23.37 × 4 =
  24. 24.36 × 4 =
  25. 25.62 × 4 =
  26. 26.25 × 8 =
  27. 27.55 × 4 =
  28. 28.43 × 4 =
  29. 29.33 × 4 =
  30. 30.29 × 4 =
  31. 31.35 × 4 =
  32. 32.19 × 4 =
  33. 33.12 × 8 =
  34. 34.27 × 8 =
  35. 35.45 × 4 =
  36. 36.13 × 8 =
  37. 37.26 × 8 =
  38. 38.16 × 8 =
  39. 39.65 × 4 =
  40. 40.71 × 4 =

Answer key

  1. 192
  2. 64
  3. 164
  4. 112
  5. 216
  6. 80
  7. 160
  8. 224
  9. 320
  10. 136
  11. 88
  12. 152
  13. 228
  14. 292
  15. 312
  16. 120
  17. 280
  18. 204
  19. 60
  20. 268
  21. 296
  22. 96
  23. 148
  24. 144
  25. 248
  26. 200
  27. 220
  28. 172
  29. 132
  30. 116
  31. 140
  32. 76
  33. 96
  34. 216
  35. 180
  36. 104
  37. 208
  38. 128
  39. 260
  40. 284

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