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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 206 · 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. 1.18 × 8 =
  2. 2.15 × 4 =
  3. 3.48 × 4 =
  4. 4.70 × 4 =
  5. 5.39 × 4 =
  6. 6.19 × 8 =
  7. 7.17 × 8 =
  8. 8.21 × 4 =
  9. 9.14 × 8 =
  10. 10.69 × 4 =
  11. 11.50 × 4 =
  12. 12.14 × 4 =
  13. 13.30 × 4 =
  14. 14.68 × 4 =
  15. 15.22 × 4 =
  16. 16.28 × 8 =
  17. 17.30 × 8 =
  18. 18.13 × 4 =
  19. 19.65 × 4 =
  20. 20.34 × 8 =
  21. 21.73 × 4 =
  22. 22.32 × 8 =
  23. 23.66 × 4 =
  24. 24.58 × 4 =
  25. 25.23 × 4 =
  26. 26.16 × 8 =
  27. 27.36 × 4 =
  28. 28.12 × 4 =
  29. 29.59 × 4 =
  30. 30.12 × 8 =
  31. 31.46 × 4 =
  32. 32.40 × 8 =
  33. 33.61 × 4 =
  34. 34.51 × 4 =
  35. 35.32 × 4 =
  36. 36.55 × 4 =
  37. 37.49 × 4 =
  38. 38.35 × 8 =
  39. 39.62 × 4 =
  40. 40.38 × 8 =

Answer key

  1. 144
  2. 60
  3. 192
  4. 280
  5. 156
  6. 152
  7. 136
  8. 84
  9. 112
  10. 276
  11. 200
  12. 56
  13. 120
  14. 272
  15. 88
  16. 224
  17. 240
  18. 52
  19. 260
  20. 272
  21. 292
  22. 256
  23. 264
  24. 232
  25. 92
  26. 128
  27. 144
  28. 48
  29. 236
  30. 96
  31. 184
  32. 320
  33. 244
  34. 204
  35. 128
  36. 220
  37. 196
  38. 280
  39. 248
  40. 304

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