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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 766 · 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. 1.71 × 4 =
  2. 2.26 × 8 =
  3. 3.55 × 4 =
  4. 4.38 × 4 =
  5. 5.39 × 8 =
  6. 6.23 × 8 =
  7. 7.74 × 4 =
  8. 8.35 × 4 =
  9. 9.24 × 4 =
  10. 10.21 × 8 =
  11. 11.59 × 4 =
  12. 12.33 × 4 =
  13. 13.18 × 8 =
  14. 14.31 × 8 =
  15. 15.34 × 8 =
  16. 16.27 × 8 =
  17. 17.38 × 8 =
  18. 18.27 × 4 =
  19. 19.19 × 8 =
  20. 20.60 × 4 =
  21. 21.49 × 4 =
  22. 22.21 × 4 =
  23. 23.17 × 8 =
  24. 24.51 × 4 =
  25. 25.23 × 4 =
  26. 26.14 × 8 =
  27. 27.29 × 4 =
  28. 28.25 × 8 =
  29. 29.36 × 4 =
  30. 30.41 × 4 =
  31. 31.16 × 8 =
  32. 32.64 × 4 =
  33. 33.16 × 4 =
  34. 34.52 × 4 =
  35. 35.20 × 8 =
  36. 36.25 × 4 =
  37. 37.70 × 4 =
  38. 38.67 × 4 =
  39. 39.28 × 8 =
  40. 40.14 × 4 =

Answer key

  1. 284
  2. 208
  3. 220
  4. 152
  5. 312
  6. 184
  7. 296
  8. 140
  9. 96
  10. 168
  11. 236
  12. 132
  13. 144
  14. 248
  15. 272
  16. 216
  17. 304
  18. 108
  19. 152
  20. 240
  21. 196
  22. 84
  23. 136
  24. 204
  25. 92
  26. 112
  27. 116
  28. 200
  29. 144
  30. 164
  31. 128
  32. 256
  33. 64
  34. 208
  35. 160
  36. 100
  37. 280
  38. 268
  39. 224
  40. 56

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