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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 546 · 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. 1.16 × 4 =
  2. 2.40 × 4 =
  3. 3.25 × 8 =
  4. 4.67 × 4 =
  5. 5.39 × 8 =
  6. 6.20 × 8 =
  7. 7.51 × 4 =
  8. 8.23 × 8 =
  9. 9.56 × 4 =
  10. 10.12 × 4 =
  11. 11.26 × 4 =
  12. 12.24 × 8 =
  13. 13.21 × 4 =
  14. 14.32 × 8 =
  15. 15.12 × 8 =
  16. 16.29 × 8 =
  17. 17.14 × 4 =
  18. 18.14 × 8 =
  19. 19.39 × 4 =
  20. 20.27 × 4 =
  21. 21.28 × 4 =
  22. 22.61 × 4 =
  23. 23.23 × 4 =
  24. 24.17 × 4 =
  25. 25.32 × 4 =
  26. 26.30 × 4 =
  27. 27.55 × 4 =
  28. 28.27 × 8 =
  29. 29.38 × 8 =
  30. 30.17 × 8 =
  31. 31.21 × 8 =
  32. 32.28 × 8 =
  33. 33.46 × 4 =
  34. 34.16 × 8 =
  35. 35.71 × 4 =
  36. 36.15 × 8 =
  37. 37.72 × 4 =
  38. 38.40 × 8 =
  39. 39.47 × 4 =
  40. 40.20 × 4 =

Answer key

  1. 64
  2. 160
  3. 200
  4. 268
  5. 312
  6. 160
  7. 204
  8. 184
  9. 224
  10. 48
  11. 104
  12. 192
  13. 84
  14. 256
  15. 96
  16. 232
  17. 56
  18. 112
  19. 156
  20. 108
  21. 112
  22. 244
  23. 92
  24. 68
  25. 128
  26. 120
  27. 220
  28. 216
  29. 304
  30. 136
  31. 168
  32. 224
  33. 184
  34. 128
  35. 284
  36. 120
  37. 288
  38. 320
  39. 188
  40. 80

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