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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 268 · 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. 1.13 × 8 =
  2. 2.62 × 4 =
  3. 3.17 × 4 =
  4. 4.46 × 4 =
  5. 5.25 × 4 =
  6. 6.17 × 8 =
  7. 7.58 × 4 =
  8. 8.54 × 4 =
  9. 9.22 × 8 =
  10. 10.56 × 4 =
  11. 11.36 × 4 =
  12. 12.31 × 4 =
  13. 13.18 × 8 =
  14. 14.16 × 8 =
  15. 15.32 × 8 =
  16. 16.34 × 8 =
  17. 17.73 × 4 =
  18. 18.40 × 8 =
  19. 19.13 × 4 =
  20. 20.20 × 8 =
  21. 21.68 × 4 =
  22. 22.19 × 8 =
  23. 23.19 × 4 =
  24. 24.45 × 4 =
  25. 25.23 × 4 =
  26. 26.61 × 4 =
  27. 27.38 × 8 =
  28. 28.15 × 4 =
  29. 29.48 × 4 =
  30. 30.55 × 4 =
  31. 31.20 × 4 =
  32. 32.27 × 4 =
  33. 33.60 × 4 =
  34. 34.39 × 8 =
  35. 35.35 × 8 =
  36. 36.24 × 8 =
  37. 37.30 × 8 =
  38. 38.57 × 4 =
  39. 39.36 × 8 =
  40. 40.30 × 4 =

Answer key

  1. 104
  2. 248
  3. 68
  4. 184
  5. 100
  6. 136
  7. 232
  8. 216
  9. 176
  10. 224
  11. 144
  12. 124
  13. 144
  14. 128
  15. 256
  16. 272
  17. 292
  18. 320
  19. 52
  20. 160
  21. 272
  22. 152
  23. 76
  24. 180
  25. 92
  26. 244
  27. 304
  28. 60
  29. 192
  30. 220
  31. 80
  32. 108
  33. 240
  34. 312
  35. 280
  36. 192
  37. 240
  38. 228
  39. 288
  40. 120

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