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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 383 · 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. 1.53 × 4 =
  2. 2.16 × 8 =
  3. 3.42 × 4 =
  4. 4.43 × 4 =
  5. 5.19 × 8 =
  6. 6.60 × 4 =
  7. 7.37 × 8 =
  8. 8.34 × 8 =
  9. 9.51 × 4 =
  10. 10.13 × 8 =
  11. 11.37 × 4 =
  12. 12.48 × 4 =
  13. 13.58 × 4 =
  14. 14.22 × 4 =
  15. 15.39 × 8 =
  16. 16.28 × 4 =
  17. 17.55 × 4 =
  18. 18.14 × 8 =
  19. 19.62 × 4 =
  20. 20.14 × 4 =
  21. 21.13 × 4 =
  22. 22.26 × 4 =
  23. 23.25 × 8 =
  24. 24.12 × 4 =
  25. 25.57 × 4 =
  26. 26.70 × 4 =
  27. 27.74 × 4 =
  28. 28.25 × 4 =
  29. 29.17 × 8 =
  30. 30.63 × 4 =
  31. 31.61 × 4 =
  32. 32.27 × 8 =
  33. 33.29 × 8 =
  34. 34.30 × 8 =
  35. 35.46 × 4 =
  36. 36.69 × 4 =
  37. 37.12 × 8 =
  38. 38.32 × 8 =
  39. 39.31 × 4 =
  40. 40.30 × 4 =

Answer key

  1. 212
  2. 128
  3. 168
  4. 172
  5. 152
  6. 240
  7. 296
  8. 272
  9. 204
  10. 104
  11. 148
  12. 192
  13. 232
  14. 88
  15. 312
  16. 112
  17. 220
  18. 112
  19. 248
  20. 56
  21. 52
  22. 104
  23. 200
  24. 48
  25. 228
  26. 280
  27. 296
  28. 100
  29. 136
  30. 252
  31. 244
  32. 216
  33. 232
  34. 240
  35. 184
  36. 276
  37. 96
  38. 256
  39. 124
  40. 120

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