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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 488 · 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. 1.16 × 8 =
  2. 2.37 × 8 =
  3. 3.20 × 4 =
  4. 4.18 × 8 =
  5. 5.19 × 8 =
  6. 6.32 × 8 =
  7. 7.34 × 8 =
  8. 8.69 × 4 =
  9. 9.13 × 8 =
  10. 10.21 × 8 =
  11. 11.65 × 4 =
  12. 12.15 × 4 =
  13. 13.57 × 4 =
  14. 14.71 × 4 =
  15. 15.54 × 4 =
  16. 16.40 × 4 =
  17. 17.74 × 4 =
  18. 18.13 × 4 =
  19. 19.48 × 4 =
  20. 20.21 × 4 =
  21. 21.23 × 8 =
  22. 22.28 × 4 =
  23. 23.30 × 4 =
  24. 24.28 × 8 =
  25. 25.31 × 8 =
  26. 26.16 × 4 =
  27. 27.25 × 8 =
  28. 28.14 × 8 =
  29. 29.51 × 4 =
  30. 30.75 × 4 =
  31. 31.37 × 4 =
  32. 32.17 × 8 =
  33. 33.70 × 4 =
  34. 34.26 × 8 =
  35. 35.14 × 4 =
  36. 36.46 × 4 =
  37. 37.36 × 8 =
  38. 38.29 × 8 =
  39. 39.15 × 8 =
  40. 40.39 × 8 =

Answer key

  1. 128
  2. 296
  3. 80
  4. 144
  5. 152
  6. 256
  7. 272
  8. 276
  9. 104
  10. 168
  11. 260
  12. 60
  13. 228
  14. 284
  15. 216
  16. 160
  17. 296
  18. 52
  19. 192
  20. 84
  21. 184
  22. 112
  23. 120
  24. 224
  25. 248
  26. 64
  27. 200
  28. 112
  29. 204
  30. 300
  31. 148
  32. 136
  33. 280
  34. 208
  35. 56
  36. 184
  37. 288
  38. 232
  39. 120
  40. 312

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