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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 430 · 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. 1.14 × 8 =
  2. 2.36 × 4 =
  3. 3.51 × 4 =
  4. 4.18 × 8 =
  5. 5.57 × 4 =
  6. 6.13 × 4 =
  7. 7.60 × 4 =
  8. 8.29 × 8 =
  9. 9.31 × 4 =
  10. 10.34 × 4 =
  11. 11.26 × 8 =
  12. 12.38 × 8 =
  13. 13.33 × 8 =
  14. 14.15 × 8 =
  15. 15.74 × 4 =
  16. 16.27 × 8 =
  17. 17.40 × 4 =
  18. 18.43 × 4 =
  19. 19.56 × 4 =
  20. 20.16 × 8 =
  21. 21.70 × 4 =
  22. 22.64 × 4 =
  23. 23.19 × 4 =
  24. 24.16 × 4 =
  25. 25.31 × 8 =
  26. 26.35 × 8 =
  27. 27.21 × 8 =
  28. 28.20 × 8 =
  29. 29.19 × 8 =
  30. 30.32 × 8 =
  31. 31.34 × 8 =
  32. 32.33 × 4 =
  33. 33.67 × 4 =
  34. 34.40 × 8 =
  35. 35.36 × 8 =
  36. 36.58 × 4 =
  37. 37.24 × 4 =
  38. 38.24 × 8 =
  39. 39.25 × 8 =
  40. 40.35 × 4 =

Answer key

  1. 112
  2. 144
  3. 204
  4. 144
  5. 228
  6. 52
  7. 240
  8. 232
  9. 124
  10. 136
  11. 208
  12. 304
  13. 264
  14. 120
  15. 296
  16. 216
  17. 160
  18. 172
  19. 224
  20. 128
  21. 280
  22. 256
  23. 76
  24. 64
  25. 248
  26. 280
  27. 168
  28. 160
  29. 152
  30. 256
  31. 272
  32. 132
  33. 268
  34. 320
  35. 288
  36. 232
  37. 96
  38. 192
  39. 200
  40. 140

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