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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 507 · 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. 1.28 × 4 =
  2. 2.24 × 8 =
  3. 3.26 × 4 =
  4. 4.71 × 4 =
  5. 5.37 × 8 =
  6. 6.12 × 8 =
  7. 7.69 × 4 =
  8. 8.28 × 8 =
  9. 9.23 × 4 =
  10. 10.51 × 4 =
  11. 11.34 × 4 =
  12. 12.18 × 4 =
  13. 13.19 × 8 =
  14. 14.14 × 4 =
  15. 15.14 × 8 =
  16. 16.74 × 4 =
  17. 17.25 × 8 =
  18. 18.40 × 8 =
  19. 19.15 × 8 =
  20. 20.23 × 8 =
  21. 21.52 × 4 =
  22. 22.17 × 8 =
  23. 23.30 × 8 =
  24. 24.38 × 4 =
  25. 25.27 × 8 =
  26. 26.63 × 4 =
  27. 27.29 × 4 =
  28. 28.60 × 4 =
  29. 29.55 × 4 =
  30. 30.72 × 4 =
  31. 31.22 × 8 =
  32. 32.57 × 4 =
  33. 33.39 × 8 =
  34. 34.20 × 8 =
  35. 35.16 × 8 =
  36. 36.39 × 4 =
  37. 37.62 × 4 =
  38. 38.26 × 8 =
  39. 39.31 × 8 =
  40. 40.16 × 4 =

Answer key

  1. 112
  2. 192
  3. 104
  4. 284
  5. 296
  6. 96
  7. 276
  8. 224
  9. 92
  10. 204
  11. 136
  12. 72
  13. 152
  14. 56
  15. 112
  16. 296
  17. 200
  18. 320
  19. 120
  20. 184
  21. 208
  22. 136
  23. 240
  24. 152
  25. 216
  26. 252
  27. 116
  28. 240
  29. 220
  30. 288
  31. 176
  32. 228
  33. 312
  34. 160
  35. 128
  36. 156
  37. 248
  38. 208
  39. 248
  40. 64

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