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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 847 · 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. 1.31 × 4 =
  2. 2.35 × 8 =
  3. 3.12 × 8 =
  4. 4.13 × 8 =
  5. 5.36 × 4 =
  6. 6.23 × 8 =
  7. 7.17 × 8 =
  8. 8.16 × 8 =
  9. 9.15 × 8 =
  10. 10.18 × 8 =
  11. 11.26 × 8 =
  12. 12.39 × 4 =
  13. 13.29 × 8 =
  14. 14.45 × 4 =
  15. 15.22 × 8 =
  16. 16.38 × 8 =
  17. 17.66 × 4 =
  18. 18.27 × 8 =
  19. 19.21 × 8 =
  20. 20.36 × 8 =
  21. 21.17 × 4 =
  22. 22.18 × 4 =
  23. 23.39 × 8 =
  24. 24.44 × 4 =
  25. 25.20 × 8 =
  26. 26.26 × 4 =
  27. 27.14 × 4 =
  28. 28.50 × 4 =
  29. 29.33 × 4 =
  30. 30.59 × 4 =
  31. 31.52 × 4 =
  32. 32.24 × 8 =
  33. 33.54 × 4 =
  34. 34.58 × 4 =
  35. 35.14 × 8 =
  36. 36.57 × 4 =
  37. 37.64 × 4 =
  38. 38.31 × 8 =
  39. 39.19 × 8 =
  40. 40.23 × 4 =

Answer key

  1. 124
  2. 280
  3. 96
  4. 104
  5. 144
  6. 184
  7. 136
  8. 128
  9. 120
  10. 144
  11. 208
  12. 156
  13. 232
  14. 180
  15. 176
  16. 304
  17. 264
  18. 216
  19. 168
  20. 288
  21. 68
  22. 72
  23. 312
  24. 176
  25. 160
  26. 104
  27. 56
  28. 200
  29. 132
  30. 236
  31. 208
  32. 192
  33. 216
  34. 232
  35. 112
  36. 228
  37. 256
  38. 248
  39. 152
  40. 92

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