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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 325 · 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. 1.32 × 8 =
  2. 2.27 × 8 =
  3. 3.57 × 4 =
  4. 4.65 × 4 =
  5. 5.20 × 4 =
  6. 6.24 × 4 =
  7. 7.12 × 8 =
  8. 8.69 × 4 =
  9. 9.35 × 8 =
  10. 10.36 × 8 =
  11. 11.22 × 8 =
  12. 12.39 × 8 =
  13. 13.40 × 8 =
  14. 14.26 × 8 =
  15. 15.22 × 4 =
  16. 16.20 × 8 =
  17. 17.54 × 4 =
  18. 18.70 × 4 =
  19. 19.30 × 4 =
  20. 20.58 × 4 =
  21. 21.42 × 4 =
  22. 22.38 × 8 =
  23. 23.34 × 4 =
  24. 24.17 × 8 =
  25. 25.75 × 4 =
  26. 26.27 × 4 =
  27. 27.19 × 8 =
  28. 28.26 × 4 =
  29. 29.56 × 4 =
  30. 30.68 × 4 =
  31. 31.15 × 8 =
  32. 32.25 × 8 =
  33. 33.15 × 4 =
  34. 34.62 × 4 =
  35. 35.51 × 4 =
  36. 36.63 × 4 =
  37. 37.33 × 8 =
  38. 38.12 × 4 =
  39. 39.37 × 4 =
  40. 40.14 × 4 =

Answer key

  1. 256
  2. 216
  3. 228
  4. 260
  5. 80
  6. 96
  7. 96
  8. 276
  9. 280
  10. 288
  11. 176
  12. 312
  13. 320
  14. 208
  15. 88
  16. 160
  17. 216
  18. 280
  19. 120
  20. 232
  21. 168
  22. 304
  23. 136
  24. 136
  25. 300
  26. 108
  27. 152
  28. 104
  29. 224
  30. 272
  31. 120
  32. 200
  33. 60
  34. 248
  35. 204
  36. 252
  37. 264
  38. 48
  39. 148
  40. 56

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