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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 732 · 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. 1.18 × 8 =
  2. 2.22 × 4 =
  3. 3.13 × 8 =
  4. 4.72 × 4 =
  5. 5.56 × 4 =
  6. 6.18 × 4 =
  7. 7.39 × 4 =
  8. 8.69 × 4 =
  9. 9.40 × 8 =
  10. 10.24 × 8 =
  11. 11.12 × 4 =
  12. 12.46 × 4 =
  13. 13.67 × 4 =
  14. 14.32 × 4 =
  15. 15.48 × 4 =
  16. 16.16 × 8 =
  17. 17.55 × 4 =
  18. 18.21 × 4 =
  19. 19.60 × 4 =
  20. 20.41 × 4 =
  21. 21.49 × 4 =
  22. 22.27 × 8 =
  23. 23.19 × 4 =
  24. 24.19 × 8 =
  25. 25.43 × 4 =
  26. 26.26 × 8 =
  27. 27.26 × 4 =
  28. 28.17 × 8 =
  29. 29.13 × 4 =
  30. 30.35 × 8 =
  31. 31.32 × 8 =
  32. 32.57 × 4 =
  33. 33.12 × 8 =
  34. 34.29 × 8 =
  35. 35.33 × 8 =
  36. 36.34 × 8 =
  37. 37.68 × 4 =
  38. 38.38 × 8 =
  39. 39.74 × 4 =
  40. 40.31 × 4 =

Answer key

  1. 144
  2. 88
  3. 104
  4. 288
  5. 224
  6. 72
  7. 156
  8. 276
  9. 320
  10. 192
  11. 48
  12. 184
  13. 268
  14. 128
  15. 192
  16. 128
  17. 220
  18. 84
  19. 240
  20. 164
  21. 196
  22. 216
  23. 76
  24. 152
  25. 172
  26. 208
  27. 104
  28. 136
  29. 52
  30. 280
  31. 256
  32. 228
  33. 96
  34. 232
  35. 264
  36. 272
  37. 272
  38. 304
  39. 296
  40. 124

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