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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 541 · 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. 1.18 × 4 =
  2. 2.25 × 8 =
  3. 3.65 × 4 =
  4. 4.15 × 4 =
  5. 5.48 × 4 =
  6. 6.33 × 4 =
  7. 7.52 × 4 =
  8. 8.39 × 8 =
  9. 9.13 × 4 =
  10. 10.26 × 8 =
  11. 11.28 × 8 =
  12. 12.20 × 8 =
  13. 13.19 × 4 =
  14. 14.16 × 4 =
  15. 15.67 × 4 =
  16. 16.28 × 4 =
  17. 17.20 × 4 =
  18. 18.14 × 8 =
  19. 19.64 × 4 =
  20. 20.59 × 4 =
  21. 21.68 × 4 =
  22. 22.17 × 8 =
  23. 23.15 × 8 =
  24. 24.14 × 4 =
  25. 25.57 × 4 =
  26. 26.49 × 4 =
  27. 27.60 × 4 =
  28. 28.24 × 4 =
  29. 29.27 × 4 =
  30. 30.51 × 4 =
  31. 31.26 × 4 =
  32. 32.54 × 4 =
  33. 33.38 × 8 =
  34. 34.22 × 4 =
  35. 35.53 × 4 =
  36. 36.39 × 4 =
  37. 37.36 × 8 =
  38. 38.21 × 8 =
  39. 39.40 × 4 =
  40. 40.50 × 4 =

Answer key

  1. 72
  2. 200
  3. 260
  4. 60
  5. 192
  6. 132
  7. 208
  8. 312
  9. 52
  10. 208
  11. 224
  12. 160
  13. 76
  14. 64
  15. 268
  16. 112
  17. 80
  18. 112
  19. 256
  20. 236
  21. 272
  22. 136
  23. 120
  24. 56
  25. 228
  26. 196
  27. 240
  28. 96
  29. 108
  30. 204
  31. 104
  32. 216
  33. 304
  34. 88
  35. 212
  36. 156
  37. 288
  38. 168
  39. 160
  40. 200

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