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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 236 · 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 × 8 =
  2. 2.24 × 8 =
  3. 3.35 × 8 =
  4. 4.26 × 4 =
  5. 5.53 × 4 =
  6. 6.61 × 4 =
  7. 7.52 × 4 =
  8. 8.12 × 4 =
  9. 9.41 × 4 =
  10. 10.16 × 8 =
  11. 11.29 × 4 =
  12. 12.33 × 4 =
  13. 13.15 × 8 =
  14. 14.25 × 8 =
  15. 15.47 × 4 =
  16. 16.37 × 8 =
  17. 17.20 × 4 =
  18. 18.36 × 8 =
  19. 19.25 × 4 =
  20. 20.67 × 4 =
  21. 21.30 × 8 =
  22. 22.14 × 8 =
  23. 23.48 × 4 =
  24. 24.21 × 8 =
  25. 25.12 × 8 =
  26. 26.32 × 4 =
  27. 27.38 × 8 =
  28. 28.60 × 4 =
  29. 29.46 × 4 =
  30. 30.44 × 4 =
  31. 31.40 × 4 =
  32. 32.62 × 4 =
  33. 33.32 × 8 =
  34. 34.16 × 4 =
  35. 35.27 × 4 =
  36. 36.39 × 8 =
  37. 37.19 × 8 =
  38. 38.65 × 4 =
  39. 39.58 × 4 =
  40. 40.64 × 4 =

Answer key

  1. 216
  2. 192
  3. 280
  4. 104
  5. 212
  6. 244
  7. 208
  8. 48
  9. 164
  10. 128
  11. 116
  12. 132
  13. 120
  14. 200
  15. 188
  16. 296
  17. 80
  18. 288
  19. 100
  20. 268
  21. 240
  22. 112
  23. 192
  24. 168
  25. 96
  26. 128
  27. 304
  28. 240
  29. 184
  30. 176
  31. 160
  32. 248
  33. 256
  34. 64
  35. 108
  36. 312
  37. 152
  38. 260
  39. 232
  40. 256

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