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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 244 · 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. 1.30 × 8 =
  2. 2.70 × 4 =
  3. 3.69 × 4 =
  4. 4.36 × 8 =
  5. 5.13 × 4 =
  6. 6.16 × 8 =
  7. 7.52 × 4 =
  8. 8.24 × 8 =
  9. 9.13 × 8 =
  10. 10.18 × 4 =
  11. 11.39 × 8 =
  12. 12.36 × 4 =
  13. 13.20 × 4 =
  14. 14.37 × 8 =
  15. 15.33 × 4 =
  16. 16.34 × 8 =
  17. 17.57 × 4 =
  18. 18.20 × 8 =
  19. 19.49 × 4 =
  20. 20.45 × 4 =
  21. 21.37 × 4 =
  22. 22.38 × 8 =
  23. 23.12 × 4 =
  24. 24.25 × 8 =
  25. 25.15 × 4 =
  26. 26.50 × 4 =
  27. 27.28 × 4 =
  28. 28.17 × 8 =
  29. 29.31 × 8 =
  30. 30.22 × 8 =
  31. 31.26 × 8 =
  32. 32.71 × 4 =
  33. 33.27 × 8 =
  34. 34.25 × 4 =
  35. 35.14 × 8 =
  36. 36.12 × 8 =
  37. 37.29 × 8 =
  38. 38.16 × 4 =
  39. 39.28 × 8 =
  40. 40.18 × 8 =

Answer key

  1. 240
  2. 280
  3. 276
  4. 288
  5. 52
  6. 128
  7. 208
  8. 192
  9. 104
  10. 72
  11. 312
  12. 144
  13. 80
  14. 296
  15. 132
  16. 272
  17. 228
  18. 160
  19. 196
  20. 180
  21. 148
  22. 304
  23. 48
  24. 200
  25. 60
  26. 200
  27. 112
  28. 136
  29. 248
  30. 176
  31. 208
  32. 284
  33. 216
  34. 100
  35. 112
  36. 96
  37. 232
  38. 64
  39. 224
  40. 144

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