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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 352 · 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. 1.20 × 4 =
  2. 2.47 × 4 =
  3. 3.40 × 4 =
  4. 4.12 × 8 =
  5. 5.21 × 8 =
  6. 6.27 × 4 =
  7. 7.17 × 4 =
  8. 8.14 × 8 =
  9. 9.68 × 4 =
  10. 10.38 × 8 =
  11. 11.31 × 4 =
  12. 12.73 × 4 =
  13. 13.67 × 4 =
  14. 14.13 × 8 =
  15. 15.65 × 4 =
  16. 16.14 × 4 =
  17. 17.27 × 8 =
  18. 18.30 × 8 =
  19. 19.35 × 4 =
  20. 20.22 × 4 =
  21. 21.19 × 8 =
  22. 22.59 × 4 =
  23. 23.33 × 4 =
  24. 24.23 × 8 =
  25. 25.25 × 4 =
  26. 26.39 × 4 =
  27. 27.31 × 8 =
  28. 28.25 × 8 =
  29. 29.51 × 4 =
  30. 30.57 × 4 =
  31. 31.24 × 4 =
  32. 32.64 × 4 =
  33. 33.28 × 8 =
  34. 34.26 × 4 =
  35. 35.55 × 4 =
  36. 36.15 × 8 =
  37. 37.33 × 8 =
  38. 38.23 × 4 =
  39. 39.39 × 8 =
  40. 40.12 × 4 =

Answer key

  1. 80
  2. 188
  3. 160
  4. 96
  5. 168
  6. 108
  7. 68
  8. 112
  9. 272
  10. 304
  11. 124
  12. 292
  13. 268
  14. 104
  15. 260
  16. 56
  17. 216
  18. 240
  19. 140
  20. 88
  21. 152
  22. 236
  23. 132
  24. 184
  25. 100
  26. 156
  27. 248
  28. 200
  29. 204
  30. 228
  31. 96
  32. 256
  33. 224
  34. 104
  35. 220
  36. 120
  37. 264
  38. 92
  39. 312
  40. 48

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