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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 459 · 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. 1.34 × 4 =
  2. 2.36 × 8 =
  3. 3.16 × 8 =
  4. 4.44 × 4 =
  5. 5.55 × 4 =
  6. 6.15 × 8 =
  7. 7.30 × 8 =
  8. 8.39 × 8 =
  9. 9.25 × 4 =
  10. 10.41 × 4 =
  11. 11.27 × 8 =
  12. 12.73 × 4 =
  13. 13.37 × 4 =
  14. 14.24 × 4 =
  15. 15.16 × 4 =
  16. 16.28 × 8 =
  17. 17.12 × 4 =
  18. 18.40 × 4 =
  19. 19.23 × 8 =
  20. 20.38 × 4 =
  21. 21.39 × 4 =
  22. 22.60 × 4 =
  23. 23.58 × 4 =
  24. 24.47 × 4 =
  25. 25.14 × 8 =
  26. 26.37 × 8 =
  27. 27.51 × 4 =
  28. 28.48 × 4 =
  29. 29.42 × 4 =
  30. 30.18 × 4 =
  31. 31.46 × 4 =
  32. 32.19 × 4 =
  33. 33.71 × 4 =
  34. 34.72 × 4 =
  35. 35.32 × 4 =
  36. 36.14 × 4 =
  37. 37.45 × 4 =
  38. 38.70 × 4 =
  39. 39.33 × 8 =
  40. 40.19 × 8 =

Answer key

  1. 136
  2. 288
  3. 128
  4. 176
  5. 220
  6. 120
  7. 240
  8. 312
  9. 100
  10. 164
  11. 216
  12. 292
  13. 148
  14. 96
  15. 64
  16. 224
  17. 48
  18. 160
  19. 184
  20. 152
  21. 156
  22. 240
  23. 232
  24. 188
  25. 112
  26. 296
  27. 204
  28. 192
  29. 168
  30. 72
  31. 184
  32. 76
  33. 284
  34. 288
  35. 128
  36. 56
  37. 180
  38. 280
  39. 264
  40. 152

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