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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 396 · 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. 1.19 × 8 =
  2. 2.13 × 4 =
  3. 3.57 × 4 =
  4. 4.30 × 8 =
  5. 5.17 × 4 =
  6. 6.43 × 4 =
  7. 7.30 × 4 =
  8. 8.31 × 8 =
  9. 9.38 × 8 =
  10. 10.38 × 4 =
  11. 11.14 × 8 =
  12. 12.68 × 4 =
  13. 13.28 × 8 =
  14. 14.14 × 4 =
  15. 15.22 × 4 =
  16. 16.27 × 4 =
  17. 17.17 × 8 =
  18. 18.26 × 4 =
  19. 19.64 × 4 =
  20. 20.74 × 4 =
  21. 21.37 × 8 =
  22. 22.33 × 8 =
  23. 23.34 × 4 =
  24. 24.21 × 8 =
  25. 25.12 × 8 =
  26. 26.63 × 4 =
  27. 27.28 × 4 =
  28. 28.16 × 8 =
  29. 29.18 × 8 =
  30. 30.66 × 4 =
  31. 31.18 × 4 =
  32. 32.29 × 8 =
  33. 33.36 × 8 =
  34. 34.13 × 8 =
  35. 35.55 × 4 =
  36. 36.33 × 4 =
  37. 37.31 × 4 =
  38. 38.50 × 4 =
  39. 39.37 × 4 =
  40. 40.22 × 8 =

Answer key

  1. 152
  2. 52
  3. 228
  4. 240
  5. 68
  6. 172
  7. 120
  8. 248
  9. 304
  10. 152
  11. 112
  12. 272
  13. 224
  14. 56
  15. 88
  16. 108
  17. 136
  18. 104
  19. 256
  20. 296
  21. 296
  22. 264
  23. 136
  24. 168
  25. 96
  26. 252
  27. 112
  28. 128
  29. 144
  30. 264
  31. 72
  32. 232
  33. 288
  34. 104
  35. 220
  36. 132
  37. 124
  38. 200
  39. 148
  40. 176

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