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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 552 · 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. 1.29 × 8 =
  2. 2.52 × 4 =
  3. 3.18 × 8 =
  4. 4.20 × 8 =
  5. 5.51 × 4 =
  6. 6.23 × 8 =
  7. 7.12 × 4 =
  8. 8.23 × 4 =
  9. 9.36 × 8 =
  10. 10.20 × 4 =
  11. 11.25 × 8 =
  12. 12.56 × 4 =
  13. 13.66 × 4 =
  14. 14.26 × 4 =
  15. 15.37 × 4 =
  16. 16.70 × 4 =
  17. 17.33 × 8 =
  18. 18.16 × 8 =
  19. 19.14 × 8 =
  20. 20.24 × 8 =
  21. 21.44 × 4 =
  22. 22.19 × 4 =
  23. 23.40 × 4 =
  24. 24.32 × 4 =
  25. 25.58 × 4 =
  26. 26.25 × 4 =
  27. 27.74 × 4 =
  28. 28.35 × 8 =
  29. 29.17 × 4 =
  30. 30.53 × 4 =
  31. 31.46 × 4 =
  32. 32.57 × 4 =
  33. 33.28 × 4 =
  34. 34.41 × 4 =
  35. 35.13 × 4 =
  36. 36.39 × 4 =
  37. 37.48 × 4 =
  38. 38.31 × 8 =
  39. 39.21 × 8 =
  40. 40.19 × 8 =

Answer key

  1. 232
  2. 208
  3. 144
  4. 160
  5. 204
  6. 184
  7. 48
  8. 92
  9. 288
  10. 80
  11. 200
  12. 224
  13. 264
  14. 104
  15. 148
  16. 280
  17. 264
  18. 128
  19. 112
  20. 192
  21. 176
  22. 76
  23. 160
  24. 128
  25. 232
  26. 100
  27. 296
  28. 280
  29. 68
  30. 212
  31. 184
  32. 228
  33. 112
  34. 164
  35. 52
  36. 156
  37. 192
  38. 248
  39. 168
  40. 152

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