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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 98 · 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. 1.36 × 8 =
  2. 2.13 × 8 =
  3. 3.12 × 4 =
  4. 4.33 × 4 =
  5. 5.31 × 8 =
  6. 6.34 × 4 =
  7. 7.32 × 8 =
  8. 8.37 × 4 =
  9. 9.21 × 4 =
  10. 10.60 × 4 =
  11. 11.25 × 4 =
  12. 12.17 × 8 =
  13. 13.38 × 8 =
  14. 14.29 × 8 =
  15. 15.74 × 4 =
  16. 16.15 × 8 =
  17. 17.69 × 4 =
  18. 18.39 × 8 =
  19. 19.28 × 8 =
  20. 20.24 × 4 =
  21. 21.17 × 4 =
  22. 22.72 × 4 =
  23. 23.36 × 4 =
  24. 24.45 × 4 =
  25. 25.35 × 8 =
  26. 26.27 × 4 =
  27. 27.56 × 4 =
  28. 28.20 × 4 =
  29. 29.21 × 8 =
  30. 30.51 × 4 =
  31. 31.66 × 4 =
  32. 32.39 × 4 =
  33. 33.67 × 4 =
  34. 34.23 × 8 =
  35. 35.63 × 4 =
  36. 36.27 × 8 =
  37. 37.48 × 4 =
  38. 38.35 × 4 =
  39. 39.55 × 4 =
  40. 40.58 × 4 =

Answer key

  1. 288
  2. 104
  3. 48
  4. 132
  5. 248
  6. 136
  7. 256
  8. 148
  9. 84
  10. 240
  11. 100
  12. 136
  13. 304
  14. 232
  15. 296
  16. 120
  17. 276
  18. 312
  19. 224
  20. 96
  21. 68
  22. 288
  23. 144
  24. 180
  25. 280
  26. 108
  27. 224
  28. 80
  29. 168
  30. 204
  31. 264
  32. 156
  33. 268
  34. 184
  35. 252
  36. 216
  37. 192
  38. 140
  39. 220
  40. 232

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