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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 911 · 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. 1.31 × 4 =
  2. 2.52 × 4 =
  3. 3.70 × 4 =
  4. 4.73 × 4 =
  5. 5.49 × 4 =
  6. 6.20 × 8 =
  7. 7.22 × 8 =
  8. 8.18 × 8 =
  9. 9.33 × 4 =
  10. 10.67 × 4 =
  11. 11.15 × 8 =
  12. 12.30 × 8 =
  13. 13.21 × 8 =
  14. 14.37 × 4 =
  15. 15.19 × 8 =
  16. 16.61 × 4 =
  17. 17.54 × 4 =
  18. 18.12 × 8 =
  19. 19.29 × 8 =
  20. 20.23 × 4 =
  21. 21.20 × 4 =
  22. 22.23 × 8 =
  23. 23.57 × 4 =
  24. 24.36 × 4 =
  25. 25.51 × 4 =
  26. 26.63 × 4 =
  27. 27.38 × 8 =
  28. 28.28 × 4 =
  29. 29.37 × 8 =
  30. 30.32 × 4 =
  31. 31.28 × 8 =
  32. 32.64 × 4 =
  33. 33.39 × 8 =
  34. 34.12 × 4 =
  35. 35.18 × 4 =
  36. 36.14 × 8 =
  37. 37.13 × 8 =
  38. 38.16 × 4 =
  39. 39.17 × 8 =
  40. 40.33 × 8 =

Answer key

  1. 124
  2. 208
  3. 280
  4. 292
  5. 196
  6. 160
  7. 176
  8. 144
  9. 132
  10. 268
  11. 120
  12. 240
  13. 168
  14. 148
  15. 152
  16. 244
  17. 216
  18. 96
  19. 232
  20. 92
  21. 80
  22. 184
  23. 228
  24. 144
  25. 204
  26. 252
  27. 304
  28. 112
  29. 296
  30. 128
  31. 224
  32. 256
  33. 312
  34. 48
  35. 72
  36. 112
  37. 104
  38. 64
  39. 136
  40. 264

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