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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 50 · 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 × 8 =
  2. 2.50 × 4 =
  3. 3.32 × 4 =
  4. 4.28 × 8 =
  5. 5.14 × 4 =
  6. 6.66 × 4 =
  7. 7.16 × 8 =
  8. 8.26 × 4 =
  9. 9.26 × 8 =
  10. 10.20 × 8 =
  11. 11.17 × 8 =
  12. 12.22 × 4 =
  13. 13.15 × 4 =
  14. 14.12 × 8 =
  15. 15.24 × 8 =
  16. 16.59 × 4 =
  17. 17.39 × 8 =
  18. 18.38 × 4 =
  19. 19.46 × 4 =
  20. 20.52 × 4 =
  21. 21.36 × 4 =
  22. 22.60 × 4 =
  23. 23.31 × 4 =
  24. 24.33 × 8 =
  25. 25.25 × 8 =
  26. 26.75 × 4 =
  27. 27.69 × 4 =
  28. 28.30 × 4 =
  29. 29.18 × 8 =
  30. 30.23 × 4 =
  31. 31.17 × 4 =
  32. 32.12 × 4 =
  33. 33.42 × 4 =
  34. 34.36 × 8 =
  35. 35.57 × 4 =
  36. 36.22 × 8 =
  37. 37.44 × 4 =
  38. 38.19 × 8 =
  39. 39.23 × 8 =
  40. 40.68 × 4 =

Answer key

  1. 296
  2. 200
  3. 128
  4. 224
  5. 56
  6. 264
  7. 128
  8. 104
  9. 208
  10. 160
  11. 136
  12. 88
  13. 60
  14. 96
  15. 192
  16. 236
  17. 312
  18. 152
  19. 184
  20. 208
  21. 144
  22. 240
  23. 124
  24. 264
  25. 200
  26. 300
  27. 276
  28. 120
  29. 144
  30. 92
  31. 68
  32. 48
  33. 168
  34. 288
  35. 228
  36. 176
  37. 176
  38. 152
  39. 184
  40. 272

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