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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 348 · 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. 1.28 × 4 =
  2. 2.14 × 8 =
  3. 3.61 × 4 =
  4. 4.18 × 4 =
  5. 5.24 × 8 =
  6. 6.39 × 4 =
  7. 7.34 × 4 =
  8. 8.37 × 8 =
  9. 9.18 × 8 =
  10. 10.67 × 4 =
  11. 11.13 × 4 =
  12. 12.27 × 4 =
  13. 13.26 × 4 =
  14. 14.56 × 4 =
  15. 15.64 × 4 =
  16. 16.27 × 8 =
  17. 17.41 × 4 =
  18. 18.33 × 8 =
  19. 19.15 × 8 =
  20. 20.24 × 4 =
  21. 21.33 × 4 =
  22. 22.21 × 8 =
  23. 23.19 × 8 =
  24. 24.34 × 8 =
  25. 25.69 × 4 =
  26. 26.32 × 8 =
  27. 27.25 × 4 =
  28. 28.51 × 4 =
  29. 29.39 × 8 =
  30. 30.52 × 4 =
  31. 31.23 × 4 =
  32. 32.40 × 4 =
  33. 33.47 × 4 =
  34. 34.38 × 8 =
  35. 35.16 × 8 =
  36. 36.58 × 4 =
  37. 37.63 × 4 =
  38. 38.23 × 8 =
  39. 39.65 × 4 =
  40. 40.22 × 4 =

Answer key

  1. 112
  2. 112
  3. 244
  4. 72
  5. 192
  6. 156
  7. 136
  8. 296
  9. 144
  10. 268
  11. 52
  12. 108
  13. 104
  14. 224
  15. 256
  16. 216
  17. 164
  18. 264
  19. 120
  20. 96
  21. 132
  22. 168
  23. 152
  24. 272
  25. 276
  26. 256
  27. 100
  28. 204
  29. 312
  30. 208
  31. 92
  32. 160
  33. 188
  34. 304
  35. 128
  36. 232
  37. 252
  38. 184
  39. 260
  40. 88

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