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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 239 · 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. 1.12 × 4 =
  2. 2.36 × 8 =
  3. 3.19 × 8 =
  4. 4.14 × 8 =
  5. 5.15 × 8 =
  6. 6.32 × 8 =
  7. 7.24 × 8 =
  8. 8.35 × 8 =
  9. 9.39 × 4 =
  10. 10.38 × 4 =
  11. 11.65 × 4 =
  12. 12.20 × 8 =
  13. 13.61 × 4 =
  14. 14.69 × 4 =
  15. 15.52 × 4 =
  16. 16.27 × 8 =
  17. 17.17 × 4 =
  18. 18.19 × 4 =
  19. 19.17 × 8 =
  20. 20.66 × 4 =
  21. 21.75 × 4 =
  22. 22.60 × 4 =
  23. 23.40 × 8 =
  24. 24.23 × 4 =
  25. 25.55 × 4 =
  26. 26.18 × 8 =
  27. 27.56 × 4 =
  28. 28.53 × 4 =
  29. 29.32 × 4 =
  30. 30.21 × 8 =
  31. 31.70 × 4 =
  32. 32.22 × 4 =
  33. 33.30 × 8 =
  34. 34.57 × 4 =
  35. 35.16 × 8 =
  36. 36.13 × 4 =
  37. 37.36 × 4 =
  38. 38.24 × 4 =
  39. 39.37 × 4 =
  40. 40.43 × 4 =

Answer key

  1. 48
  2. 288
  3. 152
  4. 112
  5. 120
  6. 256
  7. 192
  8. 280
  9. 156
  10. 152
  11. 260
  12. 160
  13. 244
  14. 276
  15. 208
  16. 216
  17. 68
  18. 76
  19. 136
  20. 264
  21. 300
  22. 240
  23. 320
  24. 92
  25. 220
  26. 144
  27. 224
  28. 212
  29. 128
  30. 168
  31. 280
  32. 88
  33. 240
  34. 228
  35. 128
  36. 52
  37. 144
  38. 96
  39. 148
  40. 172

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