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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 460 · 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. 1.27 × 4 =
  2. 2.30 × 4 =
  3. 3.15 × 8 =
  4. 4.55 × 4 =
  5. 5.12 × 4 =
  6. 6.20 × 8 =
  7. 7.33 × 4 =
  8. 8.13 × 8 =
  9. 9.21 × 4 =
  10. 10.18 × 4 =
  11. 11.32 × 4 =
  12. 12.42 × 4 =
  13. 13.57 × 4 =
  14. 14.32 × 8 =
  15. 15.28 × 8 =
  16. 16.35 × 8 =
  17. 17.56 × 4 =
  18. 18.40 × 8 =
  19. 19.21 × 8 =
  20. 20.70 × 4 =
  21. 21.16 × 8 =
  22. 22.24 × 8 =
  23. 23.53 × 4 =
  24. 24.36 × 8 =
  25. 25.44 × 4 =
  26. 26.27 × 8 =
  27. 27.35 × 4 =
  28. 28.29 × 8 =
  29. 29.15 × 4 =
  30. 30.23 × 4 =
  31. 31.37 × 4 =
  32. 32.74 × 4 =
  33. 33.17 × 4 =
  34. 34.28 × 4 =
  35. 35.41 × 4 =
  36. 36.26 × 8 =
  37. 37.22 × 8 =
  38. 38.36 × 4 =
  39. 39.34 × 8 =
  40. 40.51 × 4 =

Answer key

  1. 108
  2. 120
  3. 120
  4. 220
  5. 48
  6. 160
  7. 132
  8. 104
  9. 84
  10. 72
  11. 128
  12. 168
  13. 228
  14. 256
  15. 224
  16. 280
  17. 224
  18. 320
  19. 168
  20. 280
  21. 128
  22. 192
  23. 212
  24. 288
  25. 176
  26. 216
  27. 140
  28. 232
  29. 60
  30. 92
  31. 148
  32. 296
  33. 68
  34. 112
  35. 164
  36. 208
  37. 176
  38. 144
  39. 272
  40. 204

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