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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 590 · 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. 2.23 × 4 =
  3. 3.18 × 4 =
  4. 4.45 × 4 =
  5. 5.73 × 4 =
  6. 6.16 × 8 =
  7. 7.30 × 4 =
  8. 8.34 × 4 =
  9. 9.65 × 4 =
  10. 10.67 × 4 =
  11. 11.39 × 8 =
  12. 12.43 × 4 =
  13. 13.21 × 4 =
  14. 14.30 × 8 =
  15. 15.24 × 8 =
  16. 16.25 × 8 =
  17. 17.20 × 4 =
  18. 18.12 × 8 =
  19. 19.51 × 4 =
  20. 20.33 × 8 =
  21. 21.17 × 4 =
  22. 22.21 × 8 =
  23. 23.23 × 8 =
  24. 24.39 × 4 =
  25. 25.38 × 8 =
  26. 26.37 × 4 =
  27. 27.37 × 8 =
  28. 28.70 × 4 =
  29. 29.60 × 4 =
  30. 30.15 × 8 =
  31. 31.20 × 8 =
  32. 32.66 × 4 =
  33. 33.32 × 8 =
  34. 34.57 × 4 =
  35. 35.13 × 8 =
  36. 36.14 × 4 =
  37. 37.55 × 4 =
  38. 38.61 × 4 =
  39. 39.17 × 8 =
  40. 40.34 × 8 =

Answer key

  1. 52
  2. 92
  3. 72
  4. 180
  5. 292
  6. 128
  7. 120
  8. 136
  9. 260
  10. 268
  11. 312
  12. 172
  13. 84
  14. 240
  15. 192
  16. 200
  17. 80
  18. 96
  19. 204
  20. 264
  21. 68
  22. 168
  23. 184
  24. 156
  25. 304
  26. 148
  27. 296
  28. 280
  29. 240
  30. 120
  31. 160
  32. 264
  33. 256
  34. 228
  35. 104
  36. 56
  37. 220
  38. 244
  39. 136
  40. 272

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