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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 358 · 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. 1.69 × 4 =
  2. 2.17 × 4 =
  3. 3.27 × 4 =
  4. 4.66 × 4 =
  5. 5.34 × 8 =
  6. 6.39 × 8 =
  7. 7.12 × 8 =
  8. 8.28 × 4 =
  9. 9.65 × 4 =
  10. 10.21 × 8 =
  11. 11.16 × 8 =
  12. 12.13 × 8 =
  13. 13.53 × 4 =
  14. 14.14 × 8 =
  15. 15.25 × 8 =
  16. 16.26 × 8 =
  17. 17.21 × 4 =
  18. 18.36 × 8 =
  19. 19.56 × 4 =
  20. 20.19 × 4 =
  21. 21.15 × 8 =
  22. 22.22 × 8 =
  23. 23.29 × 8 =
  24. 24.39 × 4 =
  25. 25.43 × 4 =
  26. 26.48 × 4 =
  27. 27.37 × 8 =
  28. 28.35 × 4 =
  29. 29.18 × 8 =
  30. 30.25 × 4 =
  31. 31.18 × 4 =
  32. 32.27 × 8 =
  33. 33.13 × 4 =
  34. 34.59 × 4 =
  35. 35.47 × 4 =
  36. 36.32 × 8 =
  37. 37.40 × 8 =
  38. 38.38 × 4 =
  39. 39.60 × 4 =
  40. 40.19 × 8 =

Answer key

  1. 276
  2. 68
  3. 108
  4. 264
  5. 272
  6. 312
  7. 96
  8. 112
  9. 260
  10. 168
  11. 128
  12. 104
  13. 212
  14. 112
  15. 200
  16. 208
  17. 84
  18. 288
  19. 224
  20. 76
  21. 120
  22. 176
  23. 232
  24. 156
  25. 172
  26. 192
  27. 296
  28. 140
  29. 144
  30. 100
  31. 72
  32. 216
  33. 52
  34. 236
  35. 188
  36. 256
  37. 320
  38. 152
  39. 240
  40. 152

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