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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 280 · 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. 1.39 × 4 =
  2. 2.34 × 4 =
  3. 3.20 × 8 =
  4. 4.12 × 8 =
  5. 5.56 × 4 =
  6. 6.38 × 8 =
  7. 7.16 × 8 =
  8. 8.60 × 4 =
  9. 9.17 × 4 =
  10. 10.19 × 8 =
  11. 11.45 × 4 =
  12. 12.21 × 8 =
  13. 13.53 × 4 =
  14. 14.40 × 8 =
  15. 15.35 × 4 =
  16. 16.50 × 4 =
  17. 17.39 × 8 =
  18. 18.21 × 4 =
  19. 19.51 × 4 =
  20. 20.22 × 8 =
  21. 21.14 × 8 =
  22. 22.38 × 4 =
  23. 23.13 × 8 =
  24. 24.32 × 4 =
  25. 25.24 × 4 =
  26. 26.22 × 4 =
  27. 27.37 × 8 =
  28. 28.73 × 4 =
  29. 29.28 × 8 =
  30. 30.23 × 4 =
  31. 31.27 × 8 =
  32. 32.29 × 8 =
  33. 33.67 × 4 =
  34. 34.18 × 8 =
  35. 35.35 × 8 =
  36. 36.14 × 4 =
  37. 37.28 × 4 =
  38. 38.36 × 4 =
  39. 39.47 × 4 =
  40. 40.72 × 4 =

Answer key

  1. 156
  2. 136
  3. 160
  4. 96
  5. 224
  6. 304
  7. 128
  8. 240
  9. 68
  10. 152
  11. 180
  12. 168
  13. 212
  14. 320
  15. 140
  16. 200
  17. 312
  18. 84
  19. 204
  20. 176
  21. 112
  22. 152
  23. 104
  24. 128
  25. 96
  26. 88
  27. 296
  28. 292
  29. 224
  30. 92
  31. 216
  32. 232
  33. 268
  34. 144
  35. 280
  36. 56
  37. 112
  38. 144
  39. 188
  40. 288

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