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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 332 · 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. 1.37 × 8 =
  2. 2.39 × 4 =
  3. 3.28 × 8 =
  4. 4.20 × 8 =
  5. 5.18 × 8 =
  6. 6.33 × 8 =
  7. 7.63 × 4 =
  8. 8.13 × 8 =
  9. 9.16 × 8 =
  10. 10.40 × 8 =
  11. 11.23 × 8 =
  12. 12.15 × 8 =
  13. 13.25 × 4 =
  14. 14.17 × 4 =
  15. 15.33 × 4 =
  16. 16.32 × 8 =
  17. 17.38 × 4 =
  18. 18.59 × 4 =
  19. 19.15 × 4 =
  20. 20.61 × 4 =
  21. 21.72 × 4 =
  22. 22.13 × 4 =
  23. 23.30 × 8 =
  24. 24.31 × 4 =
  25. 25.38 × 8 =
  26. 26.65 × 4 =
  27. 27.58 × 4 =
  28. 28.36 × 8 =
  29. 29.22 × 4 =
  30. 30.42 × 4 =
  31. 31.17 × 8 =
  32. 32.25 × 8 =
  33. 33.67 × 4 =
  34. 34.16 × 4 =
  35. 35.29 × 8 =
  36. 36.48 × 4 =
  37. 37.74 × 4 =
  38. 38.12 × 8 =
  39. 39.20 × 4 =
  40. 40.54 × 4 =

Answer key

  1. 296
  2. 156
  3. 224
  4. 160
  5. 144
  6. 264
  7. 252
  8. 104
  9. 128
  10. 320
  11. 184
  12. 120
  13. 100
  14. 68
  15. 132
  16. 256
  17. 152
  18. 236
  19. 60
  20. 244
  21. 288
  22. 52
  23. 240
  24. 124
  25. 304
  26. 260
  27. 232
  28. 288
  29. 88
  30. 168
  31. 136
  32. 200
  33. 268
  34. 64
  35. 232
  36. 192
  37. 296
  38. 96
  39. 80
  40. 216

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