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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 431 · 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. 1.39 × 8 =
  2. 2.73 × 4 =
  3. 3.17 × 4 =
  4. 4.61 × 4 =
  5. 5.29 × 4 =
  6. 6.12 × 8 =
  7. 7.37 × 4 =
  8. 8.69 × 4 =
  9. 9.13 × 8 =
  10. 10.28 × 4 =
  11. 11.46 × 4 =
  12. 12.24 × 8 =
  13. 13.15 × 8 =
  14. 14.22 × 8 =
  15. 15.26 × 8 =
  16. 16.48 × 4 =
  17. 17.18 × 4 =
  18. 18.40 × 8 =
  19. 19.57 × 4 =
  20. 20.13 × 4 =
  21. 21.37 × 8 =
  22. 22.44 × 4 =
  23. 23.28 × 8 =
  24. 24.20 × 4 =
  25. 25.21 × 8 =
  26. 26.62 × 4 =
  27. 27.22 × 4 =
  28. 28.30 × 8 =
  29. 29.63 × 4 =
  30. 30.59 × 4 =
  31. 31.31 × 8 =
  32. 32.35 × 8 =
  33. 33.14 × 8 =
  34. 34.45 × 4 =
  35. 35.18 × 8 =
  36. 36.24 × 4 =
  37. 37.23 × 8 =
  38. 38.27 × 4 =
  39. 39.29 × 8 =
  40. 40.36 × 8 =

Answer key

  1. 312
  2. 292
  3. 68
  4. 244
  5. 116
  6. 96
  7. 148
  8. 276
  9. 104
  10. 112
  11. 184
  12. 192
  13. 120
  14. 176
  15. 208
  16. 192
  17. 72
  18. 320
  19. 228
  20. 52
  21. 296
  22. 176
  23. 224
  24. 80
  25. 168
  26. 248
  27. 88
  28. 240
  29. 252
  30. 236
  31. 248
  32. 280
  33. 112
  34. 180
  35. 144
  36. 96
  37. 184
  38. 108
  39. 232
  40. 288

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