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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 608 · 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. 1.22 × 4 =
  2. 2.15 × 4 =
  3. 3.31 × 4 =
  4. 4.46 × 4 =
  5. 5.28 × 8 =
  6. 6.13 × 4 =
  7. 7.18 × 4 =
  8. 8.24 × 8 =
  9. 9.22 × 8 =
  10. 10.62 × 4 =
  11. 11.16 × 8 =
  12. 12.39 × 8 =
  13. 13.33 × 8 =
  14. 14.53 × 4 =
  15. 15.40 × 8 =
  16. 16.44 × 4 =
  17. 17.51 × 4 =
  18. 18.13 × 8 =
  19. 19.17 × 8 =
  20. 20.26 × 4 =
  21. 21.21 × 8 =
  22. 22.57 × 4 =
  23. 23.60 × 4 =
  24. 24.17 × 4 =
  25. 25.20 × 4 =
  26. 26.27 × 8 =
  27. 27.74 × 4 =
  28. 28.38 × 8 =
  29. 29.35 × 4 =
  30. 30.37 × 4 =
  31. 31.31 × 8 =
  32. 32.15 × 8 =
  33. 33.25 × 4 =
  34. 34.34 × 8 =
  35. 35.33 × 4 =
  36. 36.45 × 4 =
  37. 37.28 × 4 =
  38. 38.32 × 8 =
  39. 39.32 × 4 =
  40. 40.55 × 4 =

Answer key

  1. 88
  2. 60
  3. 124
  4. 184
  5. 224
  6. 52
  7. 72
  8. 192
  9. 176
  10. 248
  11. 128
  12. 312
  13. 264
  14. 212
  15. 320
  16. 176
  17. 204
  18. 104
  19. 136
  20. 104
  21. 168
  22. 228
  23. 240
  24. 68
  25. 80
  26. 216
  27. 296
  28. 304
  29. 140
  30. 148
  31. 248
  32. 120
  33. 100
  34. 272
  35. 132
  36. 180
  37. 112
  38. 256
  39. 128
  40. 220

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