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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 578 · 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. 1.37 × 4 =
  2. 2.26 × 4 =
  3. 3.55 × 4 =
  4. 4.24 × 8 =
  5. 5.35 × 4 =
  6. 6.38 × 8 =
  7. 7.40 × 4 =
  8. 8.74 × 4 =
  9. 9.36 × 8 =
  10. 10.73 × 4 =
  11. 11.21 × 4 =
  12. 12.17 × 8 =
  13. 13.56 × 4 =
  14. 14.13 × 4 =
  15. 15.23 × 8 =
  16. 16.75 × 4 =
  17. 17.32 × 4 =
  18. 18.57 × 4 =
  19. 19.52 × 4 =
  20. 20.39 × 4 =
  21. 21.35 × 8 =
  22. 22.14 × 4 =
  23. 23.12 × 8 =
  24. 24.13 × 8 =
  25. 25.39 × 8 =
  26. 26.31 × 8 =
  27. 27.32 × 8 =
  28. 28.30 × 4 =
  29. 29.38 × 4 =
  30. 30.12 × 4 =
  31. 31.53 × 4 =
  32. 32.60 × 4 =
  33. 33.42 × 4 =
  34. 34.41 × 4 =
  35. 35.70 × 4 =
  36. 36.49 × 4 =
  37. 37.22 × 4 =
  38. 38.18 × 4 =
  39. 39.26 × 8 =
  40. 40.22 × 8 =

Answer key

  1. 148
  2. 104
  3. 220
  4. 192
  5. 140
  6. 304
  7. 160
  8. 296
  9. 288
  10. 292
  11. 84
  12. 136
  13. 224
  14. 52
  15. 184
  16. 300
  17. 128
  18. 228
  19. 208
  20. 156
  21. 280
  22. 56
  23. 96
  24. 104
  25. 312
  26. 248
  27. 256
  28. 120
  29. 152
  30. 48
  31. 212
  32. 240
  33. 168
  34. 164
  35. 280
  36. 196
  37. 88
  38. 72
  39. 208
  40. 176

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