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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 723 · 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. 1.13 × 4 =
  2. 2.30 × 4 =
  3. 3.26 × 4 =
  4. 4.14 × 8 =
  5. 5.61 × 4 =
  6. 6.16 × 8 =
  7. 7.12 × 8 =
  8. 8.15 × 8 =
  9. 9.17 × 8 =
  10. 10.25 × 4 =
  11. 11.22 × 8 =
  12. 12.42 × 4 =
  13. 13.15 × 4 =
  14. 14.22 × 4 =
  15. 15.28 × 8 =
  16. 16.66 × 4 =
  17. 17.13 × 8 =
  18. 18.70 × 4 =
  19. 19.57 × 4 =
  20. 20.73 × 4 =
  21. 21.58 × 4 =
  22. 22.48 × 4 =
  23. 23.14 × 4 =
  24. 24.65 × 4 =
  25. 25.21 × 8 =
  26. 26.35 × 8 =
  27. 27.20 × 8 =
  28. 28.67 × 4 =
  29. 29.12 × 4 =
  30. 30.31 × 8 =
  31. 31.43 × 4 =
  32. 32.51 × 4 =
  33. 33.74 × 4 =
  34. 34.63 × 4 =
  35. 35.38 × 4 =
  36. 36.37 × 8 =
  37. 37.26 × 8 =
  38. 38.32 × 8 =
  39. 39.24 × 8 =
  40. 40.27 × 8 =

Answer key

  1. 52
  2. 120
  3. 104
  4. 112
  5. 244
  6. 128
  7. 96
  8. 120
  9. 136
  10. 100
  11. 176
  12. 168
  13. 60
  14. 88
  15. 224
  16. 264
  17. 104
  18. 280
  19. 228
  20. 292
  21. 232
  22. 192
  23. 56
  24. 260
  25. 168
  26. 280
  27. 160
  28. 268
  29. 48
  30. 248
  31. 172
  32. 204
  33. 296
  34. 252
  35. 152
  36. 296
  37. 208
  38. 256
  39. 192
  40. 216

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