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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 260 · 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. 1.23 × 8 =
  2. 2.16 × 4 =
  3. 3.12 × 4 =
  4. 4.22 × 8 =
  5. 5.35 × 4 =
  6. 6.13 × 8 =
  7. 7.60 × 4 =
  8. 8.39 × 4 =
  9. 9.29 × 8 =
  10. 10.40 × 8 =
  11. 11.54 × 4 =
  12. 12.33 × 4 =
  13. 13.53 × 4 =
  14. 14.30 × 8 =
  15. 15.38 × 8 =
  16. 16.28 × 8 =
  17. 17.39 × 8 =
  18. 18.72 × 4 =
  19. 19.25 × 8 =
  20. 20.61 × 4 =
  21. 21.20 × 4 =
  22. 22.34 × 4 =
  23. 23.52 × 4 =
  24. 24.51 × 4 =
  25. 25.63 × 4 =
  26. 26.19 × 8 =
  27. 27.17 × 8 =
  28. 28.16 × 8 =
  29. 29.18 × 8 =
  30. 30.24 × 8 =
  31. 31.32 × 8 =
  32. 32.19 × 4 =
  33. 33.70 × 4 =
  34. 34.37 × 8 =
  35. 35.36 × 4 =
  36. 36.31 × 8 =
  37. 37.33 × 8 =
  38. 38.21 × 8 =
  39. 39.27 × 8 =
  40. 40.41 × 4 =

Answer key

  1. 184
  2. 64
  3. 48
  4. 176
  5. 140
  6. 104
  7. 240
  8. 156
  9. 232
  10. 320
  11. 216
  12. 132
  13. 212
  14. 240
  15. 304
  16. 224
  17. 312
  18. 288
  19. 200
  20. 244
  21. 80
  22. 136
  23. 208
  24. 204
  25. 252
  26. 152
  27. 136
  28. 128
  29. 144
  30. 192
  31. 256
  32. 76
  33. 280
  34. 296
  35. 144
  36. 248
  37. 264
  38. 168
  39. 216
  40. 164

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