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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 762 · 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. 1.34 × 8 =
  2. 2.56 × 4 =
  3. 3.44 × 4 =
  4. 4.64 × 4 =
  5. 5.27 × 8 =
  6. 6.16 × 4 =
  7. 7.45 × 4 =
  8. 8.26 × 8 =
  9. 9.62 × 4 =
  10. 10.65 × 4 =
  11. 11.30 × 8 =
  12. 12.12 × 4 =
  13. 13.19 × 8 =
  14. 14.30 × 4 =
  15. 15.37 × 8 =
  16. 16.32 × 4 =
  17. 17.24 × 4 =
  18. 18.18 × 4 =
  19. 19.63 × 4 =
  20. 20.46 × 4 =
  21. 21.55 × 4 =
  22. 22.43 × 4 =
  23. 23.13 × 8 =
  24. 24.32 × 8 =
  25. 25.12 × 8 =
  26. 26.25 × 8 =
  27. 27.38 × 8 =
  28. 28.15 × 8 =
  29. 29.36 × 8 =
  30. 30.18 × 8 =
  31. 31.60 × 4 =
  32. 32.21 × 8 =
  33. 33.29 × 4 =
  34. 34.19 × 4 =
  35. 35.22 × 4 =
  36. 36.52 × 4 =
  37. 37.28 × 8 =
  38. 38.51 × 4 =
  39. 39.68 × 4 =
  40. 40.42 × 4 =

Answer key

  1. 272
  2. 224
  3. 176
  4. 256
  5. 216
  6. 64
  7. 180
  8. 208
  9. 248
  10. 260
  11. 240
  12. 48
  13. 152
  14. 120
  15. 296
  16. 128
  17. 96
  18. 72
  19. 252
  20. 184
  21. 220
  22. 172
  23. 104
  24. 256
  25. 96
  26. 200
  27. 304
  28. 120
  29. 288
  30. 144
  31. 240
  32. 168
  33. 116
  34. 76
  35. 88
  36. 208
  37. 224
  38. 204
  39. 272
  40. 168

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