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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 53 · 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. 1.63 × 4 =
  2. 2.71 × 4 =
  3. 3.20 × 4 =
  4. 4.27 × 4 =
  5. 5.14 × 8 =
  6. 6.69 × 4 =
  7. 7.17 × 8 =
  8. 8.43 × 4 =
  9. 9.46 × 4 =
  10. 10.59 × 4 =
  11. 11.39 × 8 =
  12. 12.16 × 4 =
  13. 13.23 × 4 =
  14. 14.21 × 8 =
  15. 15.23 × 8 =
  16. 16.26 × 4 =
  17. 17.28 × 4 =
  18. 18.49 × 4 =
  19. 19.37 × 8 =
  20. 20.33 × 4 =
  21. 21.30 × 8 =
  22. 22.32 × 4 =
  23. 23.28 × 8 =
  24. 24.36 × 8 =
  25. 25.26 × 8 =
  26. 26.51 × 4 =
  27. 27.13 × 8 =
  28. 28.16 × 8 =
  29. 29.44 × 4 =
  30. 30.62 × 4 =
  31. 31.50 × 4 =
  32. 32.18 × 8 =
  33. 33.38 × 4 =
  34. 34.58 × 4 =
  35. 35.24 × 8 =
  36. 36.37 × 4 =
  37. 37.13 × 4 =
  38. 38.45 × 4 =
  39. 39.53 × 4 =
  40. 40.12 × 4 =

Answer key

  1. 252
  2. 284
  3. 80
  4. 108
  5. 112
  6. 276
  7. 136
  8. 172
  9. 184
  10. 236
  11. 312
  12. 64
  13. 92
  14. 168
  15. 184
  16. 104
  17. 112
  18. 196
  19. 296
  20. 132
  21. 240
  22. 128
  23. 224
  24. 288
  25. 208
  26. 204
  27. 104
  28. 128
  29. 176
  30. 248
  31. 200
  32. 144
  33. 152
  34. 232
  35. 192
  36. 148
  37. 52
  38. 180
  39. 212
  40. 48

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