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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 312 · 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. 1.54 × 4 =
  2. 2.15 × 4 =
  3. 3.36 × 8 =
  4. 4.50 × 4 =
  5. 5.33 × 8 =
  6. 6.18 × 8 =
  7. 7.26 × 4 =
  8. 8.19 × 8 =
  9. 9.35 × 8 =
  10. 10.65 × 4 =
  11. 11.51 × 4 =
  12. 12.39 × 4 =
  13. 13.34 × 8 =
  14. 14.17 × 8 =
  15. 15.16 × 8 =
  16. 16.64 × 4 =
  17. 17.17 × 4 =
  18. 18.37 × 8 =
  19. 19.26 × 8 =
  20. 20.57 × 4 =
  21. 21.22 × 4 =
  22. 22.42 × 4 =
  23. 23.56 × 4 =
  24. 24.46 × 4 =
  25. 25.32 × 8 =
  26. 26.13 × 4 =
  27. 27.34 × 4 =
  28. 28.59 × 4 =
  29. 29.28 × 4 =
  30. 30.23 × 4 =
  31. 31.62 × 4 =
  32. 32.29 × 8 =
  33. 33.32 × 4 =
  34. 34.35 × 4 =
  35. 35.23 × 8 =
  36. 36.72 × 4 =
  37. 37.49 × 4 =
  38. 38.71 × 4 =
  39. 39.33 × 4 =
  40. 40.67 × 4 =

Answer key

  1. 216
  2. 60
  3. 288
  4. 200
  5. 264
  6. 144
  7. 104
  8. 152
  9. 280
  10. 260
  11. 204
  12. 156
  13. 272
  14. 136
  15. 128
  16. 256
  17. 68
  18. 296
  19. 208
  20. 228
  21. 88
  22. 168
  23. 224
  24. 184
  25. 256
  26. 52
  27. 136
  28. 236
  29. 112
  30. 92
  31. 248
  32. 232
  33. 128
  34. 140
  35. 184
  36. 288
  37. 196
  38. 284
  39. 132
  40. 268

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