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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 664 · 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. 1.37 × 4 =
  2. 2.22 × 4 =
  3. 3.20 × 8 =
  4. 4.51 × 4 =
  5. 5.37 × 8 =
  6. 6.69 × 4 =
  7. 7.33 × 4 =
  8. 8.40 × 8 =
  9. 9.19 × 4 =
  10. 10.70 × 4 =
  11. 11.18 × 8 =
  12. 12.21 × 8 =
  13. 13.25 × 8 =
  14. 14.32 × 8 =
  15. 15.26 × 8 =
  16. 16.48 × 4 =
  17. 17.21 × 4 =
  18. 18.59 × 4 =
  19. 19.39 × 8 =
  20. 20.15 × 8 =
  21. 21.72 × 4 =
  22. 22.36 × 4 =
  23. 23.55 × 4 =
  24. 24.36 × 8 =
  25. 25.74 × 4 =
  26. 26.29 × 8 =
  27. 27.57 × 4 =
  28. 28.35 × 8 =
  29. 29.52 × 4 =
  30. 30.17 × 8 =
  31. 31.31 × 8 =
  32. 32.24 × 4 =
  33. 33.23 × 4 =
  34. 34.53 × 4 =
  35. 35.14 × 8 =
  36. 36.20 × 4 =
  37. 37.40 × 4 =
  38. 38.38 × 8 =
  39. 39.73 × 4 =
  40. 40.27 × 4 =

Answer key

  1. 148
  2. 88
  3. 160
  4. 204
  5. 296
  6. 276
  7. 132
  8. 320
  9. 76
  10. 280
  11. 144
  12. 168
  13. 200
  14. 256
  15. 208
  16. 192
  17. 84
  18. 236
  19. 312
  20. 120
  21. 288
  22. 144
  23. 220
  24. 288
  25. 296
  26. 232
  27. 228
  28. 280
  29. 208
  30. 136
  31. 248
  32. 96
  33. 92
  34. 212
  35. 112
  36. 80
  37. 160
  38. 304
  39. 292
  40. 108

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