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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 563 · 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. 1.18 × 4 =
  2. 2.48 × 4 =
  3. 3.24 × 4 =
  4. 4.23 × 4 =
  5. 5.12 × 8 =
  6. 6.59 × 4 =
  7. 7.36 × 4 =
  8. 8.16 × 4 =
  9. 9.46 × 4 =
  10. 10.29 × 8 =
  11. 11.19 × 8 =
  12. 12.17 × 4 =
  13. 13.51 × 4 =
  14. 14.34 × 8 =
  15. 15.34 × 4 =
  16. 16.25 × 8 =
  17. 17.32 × 8 =
  18. 18.42 × 4 =
  19. 19.67 × 4 =
  20. 20.74 × 4 =
  21. 21.28 × 8 =
  22. 22.18 × 8 =
  23. 23.37 × 8 =
  24. 24.22 × 8 =
  25. 25.13 × 4 =
  26. 26.24 × 8 =
  27. 27.49 × 4 =
  28. 28.36 × 8 =
  29. 29.27 × 8 =
  30. 30.56 × 4 =
  31. 31.43 × 4 =
  32. 32.26 × 4 =
  33. 33.20 × 4 =
  34. 34.54 × 4 =
  35. 35.37 × 4 =
  36. 36.30 × 8 =
  37. 37.12 × 4 =
  38. 38.30 × 4 =
  39. 39.21 × 4 =
  40. 40.31 × 4 =

Answer key

  1. 72
  2. 192
  3. 96
  4. 92
  5. 96
  6. 236
  7. 144
  8. 64
  9. 184
  10. 232
  11. 152
  12. 68
  13. 204
  14. 272
  15. 136
  16. 200
  17. 256
  18. 168
  19. 268
  20. 296
  21. 224
  22. 144
  23. 296
  24. 176
  25. 52
  26. 192
  27. 196
  28. 288
  29. 216
  30. 224
  31. 172
  32. 104
  33. 80
  34. 216
  35. 148
  36. 240
  37. 48
  38. 120
  39. 84
  40. 124

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