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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 368 · 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. 1.19 × 4 =
  2. 2.39 × 4 =
  3. 3.25 × 8 =
  4. 4.74 × 4 =
  5. 5.51 × 4 =
  6. 6.62 × 4 =
  7. 7.34 × 4 =
  8. 8.12 × 4 =
  9. 9.45 × 4 =
  10. 10.24 × 8 =
  11. 11.50 × 4 =
  12. 12.39 × 8 =
  13. 13.35 × 8 =
  14. 14.12 × 8 =
  15. 15.67 × 4 =
  16. 16.38 × 8 =
  17. 17.22 × 4 =
  18. 18.16 × 4 =
  19. 19.13 × 4 =
  20. 20.63 × 4 =
  21. 21.30 × 8 =
  22. 22.64 × 4 =
  23. 23.36 × 8 =
  24. 24.16 × 8 =
  25. 25.73 × 4 =
  26. 26.18 × 8 =
  27. 27.42 × 4 =
  28. 28.36 × 4 =
  29. 29.40 × 8 =
  30. 30.20 × 4 =
  31. 31.27 × 8 =
  32. 32.33 × 8 =
  33. 33.31 × 8 =
  34. 34.14 × 4 =
  35. 35.46 × 4 =
  36. 36.13 × 8 =
  37. 37.52 × 4 =
  38. 38.41 × 4 =
  39. 39.56 × 4 =
  40. 40.23 × 4 =

Answer key

  1. 76
  2. 156
  3. 200
  4. 296
  5. 204
  6. 248
  7. 136
  8. 48
  9. 180
  10. 192
  11. 200
  12. 312
  13. 280
  14. 96
  15. 268
  16. 304
  17. 88
  18. 64
  19. 52
  20. 252
  21. 240
  22. 256
  23. 288
  24. 128
  25. 292
  26. 144
  27. 168
  28. 144
  29. 320
  30. 80
  31. 216
  32. 264
  33. 248
  34. 56
  35. 184
  36. 104
  37. 208
  38. 164
  39. 224
  40. 92

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