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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 207 · 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. 1.30 × 8 =
  2. 2.17 × 8 =
  3. 3.12 × 8 =
  4. 4.37 × 8 =
  5. 5.26 × 4 =
  6. 6.15 × 8 =
  7. 7.13 × 8 =
  8. 8.26 × 8 =
  9. 9.47 × 4 =
  10. 10.54 × 4 =
  11. 11.13 × 4 =
  12. 12.65 × 4 =
  13. 13.20 × 8 =
  14. 14.30 × 4 =
  15. 15.31 × 8 =
  16. 16.18 × 8 =
  17. 17.14 × 8 =
  18. 18.72 × 4 =
  19. 19.24 × 8 =
  20. 20.21 × 8 =
  21. 21.42 × 4 =
  22. 22.12 × 4 =
  23. 23.28 × 4 =
  24. 24.22 × 4 =
  25. 25.69 × 4 =
  26. 26.64 × 4 =
  27. 27.36 × 8 =
  28. 28.14 × 4 =
  29. 29.70 × 4 =
  30. 30.16 × 4 =
  31. 31.32 × 8 =
  32. 32.22 × 8 =
  33. 33.39 × 8 =
  34. 34.17 × 4 =
  35. 35.37 × 4 =
  36. 36.39 × 4 =
  37. 37.23 × 8 =
  38. 38.28 × 8 =
  39. 39.44 × 4 =
  40. 40.74 × 4 =

Answer key

  1. 240
  2. 136
  3. 96
  4. 296
  5. 104
  6. 120
  7. 104
  8. 208
  9. 188
  10. 216
  11. 52
  12. 260
  13. 160
  14. 120
  15. 248
  16. 144
  17. 112
  18. 288
  19. 192
  20. 168
  21. 168
  22. 48
  23. 112
  24. 88
  25. 276
  26. 256
  27. 288
  28. 56
  29. 280
  30. 64
  31. 256
  32. 176
  33. 312
  34. 68
  35. 148
  36. 156
  37. 184
  38. 224
  39. 176
  40. 296

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