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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 490 · 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. 1.20 × 8 =
  2. 2.28 × 8 =
  3. 3.24 × 4 =
  4. 4.33 × 8 =
  5. 5.19 × 4 =
  6. 6.67 × 4 =
  7. 7.34 × 4 =
  8. 8.17 × 8 =
  9. 9.17 × 4 =
  10. 10.57 × 4 =
  11. 11.31 × 8 =
  12. 12.18 × 8 =
  13. 13.14 × 8 =
  14. 14.41 × 4 =
  15. 15.22 × 4 =
  16. 16.59 × 4 =
  17. 17.31 × 4 =
  18. 18.22 × 8 =
  19. 19.51 × 4 =
  20. 20.62 × 4 =
  21. 21.35 × 8 =
  22. 22.30 × 4 =
  23. 23.39 × 8 =
  24. 24.12 × 8 =
  25. 25.21 × 8 =
  26. 26.21 × 4 =
  27. 27.35 × 4 =
  28. 28.15 × 4 =
  29. 29.66 × 4 =
  30. 30.40 × 8 =
  31. 31.32 × 8 =
  32. 32.23 × 4 =
  33. 33.29 × 8 =
  34. 34.24 × 8 =
  35. 35.27 × 8 =
  36. 36.72 × 4 =
  37. 37.36 × 8 =
  38. 38.38 × 8 =
  39. 39.15 × 8 =
  40. 40.18 × 4 =

Answer key

  1. 160
  2. 224
  3. 96
  4. 264
  5. 76
  6. 268
  7. 136
  8. 136
  9. 68
  10. 228
  11. 248
  12. 144
  13. 112
  14. 164
  15. 88
  16. 236
  17. 124
  18. 176
  19. 204
  20. 248
  21. 280
  22. 120
  23. 312
  24. 96
  25. 168
  26. 84
  27. 140
  28. 60
  29. 264
  30. 320
  31. 256
  32. 92
  33. 232
  34. 192
  35. 216
  36. 288
  37. 288
  38. 304
  39. 120
  40. 72

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