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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 382 · 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. 1.24 × 4 =
  2. 2.15 × 8 =
  3. 3.12 × 4 =
  4. 4.38 × 8 =
  5. 5.36 × 8 =
  6. 6.34 × 8 =
  7. 7.48 × 4 =
  8. 8.32 × 8 =
  9. 9.60 × 4 =
  10. 10.62 × 4 =
  11. 11.58 × 4 =
  12. 12.14 × 8 =
  13. 13.30 × 8 =
  14. 14.40 × 4 =
  15. 15.20 × 8 =
  16. 16.47 × 4 =
  17. 17.25 × 8 =
  18. 18.27 × 8 =
  19. 19.13 × 8 =
  20. 20.28 × 4 =
  21. 21.57 × 4 =
  22. 22.26 × 8 =
  23. 23.16 × 8 =
  24. 24.51 × 4 =
  25. 25.26 × 4 =
  26. 26.39 × 8 =
  27. 27.50 × 4 =
  28. 28.14 × 4 =
  29. 29.21 × 8 =
  30. 30.13 × 4 =
  31. 31.69 × 4 =
  32. 32.41 × 4 =
  33. 33.65 × 4 =
  34. 34.44 × 4 =
  35. 35.18 × 8 =
  36. 36.37 × 8 =
  37. 37.33 × 4 =
  38. 38.21 × 4 =
  39. 39.31 × 8 =
  40. 40.72 × 4 =

Answer key

  1. 96
  2. 120
  3. 48
  4. 304
  5. 288
  6. 272
  7. 192
  8. 256
  9. 240
  10. 248
  11. 232
  12. 112
  13. 240
  14. 160
  15. 160
  16. 188
  17. 200
  18. 216
  19. 104
  20. 112
  21. 228
  22. 208
  23. 128
  24. 204
  25. 104
  26. 312
  27. 200
  28. 56
  29. 168
  30. 52
  31. 276
  32. 164
  33. 260
  34. 176
  35. 144
  36. 296
  37. 132
  38. 84
  39. 248
  40. 288

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