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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 340 · 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. 1.67 × 4 =
  2. 2.36 × 8 =
  3. 3.64 × 4 =
  4. 4.32 × 8 =
  5. 5.16 × 4 =
  6. 6.50 × 4 =
  7. 7.40 × 8 =
  8. 8.27 × 8 =
  9. 9.34 × 8 =
  10. 10.61 × 4 =
  11. 11.31 × 8 =
  12. 12.29 × 4 =
  13. 13.52 × 4 =
  14. 14.26 × 8 =
  15. 15.26 × 4 =
  16. 16.16 × 8 =
  17. 17.15 × 8 =
  18. 18.22 × 8 =
  19. 19.19 × 8 =
  20. 20.53 × 4 =
  21. 21.13 × 4 =
  22. 22.39 × 4 =
  23. 23.25 × 4 =
  24. 24.38 × 8 =
  25. 25.23 × 4 =
  26. 26.33 × 8 =
  27. 27.22 × 4 =
  28. 28.18 × 8 =
  29. 29.29 × 8 =
  30. 30.14 × 8 =
  31. 31.39 × 8 =
  32. 32.74 × 4 =
  33. 33.56 × 4 =
  34. 34.71 × 4 =
  35. 35.21 × 8 =
  36. 36.70 × 4 =
  37. 37.12 × 8 =
  38. 38.28 × 8 =
  39. 39.60 × 4 =
  40. 40.51 × 4 =

Answer key

  1. 268
  2. 288
  3. 256
  4. 256
  5. 64
  6. 200
  7. 320
  8. 216
  9. 272
  10. 244
  11. 248
  12. 116
  13. 208
  14. 208
  15. 104
  16. 128
  17. 120
  18. 176
  19. 152
  20. 212
  21. 52
  22. 156
  23. 100
  24. 304
  25. 92
  26. 264
  27. 88
  28. 144
  29. 232
  30. 112
  31. 312
  32. 296
  33. 224
  34. 284
  35. 168
  36. 280
  37. 96
  38. 224
  39. 240
  40. 204

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