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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 760 · 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. 1.15 × 4 =
  2. 2.30 × 4 =
  3. 3.40 × 8 =
  4. 4.69 × 4 =
  5. 5.42 × 4 =
  6. 6.23 × 8 =
  7. 7.32 × 8 =
  8. 8.19 × 8 =
  9. 9.36 × 8 =
  10. 10.73 × 4 =
  11. 11.67 × 4 =
  12. 12.22 × 4 =
  13. 13.58 × 4 =
  14. 14.31 × 8 =
  15. 15.33 × 8 =
  16. 16.20 × 8 =
  17. 17.13 × 8 =
  18. 18.28 × 8 =
  19. 19.52 × 4 =
  20. 20.55 × 4 =
  21. 21.53 × 4 =
  22. 22.37 × 8 =
  23. 23.26 × 4 =
  24. 24.72 × 4 =
  25. 25.30 × 8 =
  26. 26.21 × 8 =
  27. 27.51 × 4 =
  28. 28.46 × 4 =
  29. 29.57 × 4 =
  30. 30.59 × 4 =
  31. 31.21 × 4 =
  32. 32.32 × 4 =
  33. 33.19 × 4 =
  34. 34.20 × 4 =
  35. 35.33 × 4 =
  36. 36.27 × 8 =
  37. 37.56 × 4 =
  38. 38.16 × 4 =
  39. 39.66 × 4 =
  40. 40.15 × 8 =

Answer key

  1. 60
  2. 120
  3. 320
  4. 276
  5. 168
  6. 184
  7. 256
  8. 152
  9. 288
  10. 292
  11. 268
  12. 88
  13. 232
  14. 248
  15. 264
  16. 160
  17. 104
  18. 224
  19. 208
  20. 220
  21. 212
  22. 296
  23. 104
  24. 288
  25. 240
  26. 168
  27. 204
  28. 184
  29. 228
  30. 236
  31. 84
  32. 128
  33. 76
  34. 80
  35. 132
  36. 216
  37. 224
  38. 64
  39. 264
  40. 120

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