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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 898 · 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. 2.19 × 4 =
  3. 3.37 × 4 =
  4. 4.38 × 8 =
  5. 5.49 × 4 =
  6. 6.22 × 8 =
  7. 7.37 × 8 =
  8. 8.40 × 8 =
  9. 9.28 × 8 =
  10. 10.29 × 4 =
  11. 11.12 × 4 =
  12. 12.31 × 4 =
  13. 13.27 × 8 =
  14. 14.60 × 4 =
  15. 15.27 × 4 =
  16. 16.39 × 8 =
  17. 17.16 × 8 =
  18. 18.65 × 4 =
  19. 19.14 × 8 =
  20. 20.17 × 4 =
  21. 21.21 × 4 =
  22. 22.48 × 4 =
  23. 23.20 × 8 =
  24. 24.13 × 8 =
  25. 25.30 × 4 =
  26. 26.59 × 4 =
  27. 27.17 × 8 =
  28. 28.26 × 4 =
  29. 29.45 × 4 =
  30. 30.32 × 8 =
  31. 31.39 × 4 =
  32. 32.50 × 4 =
  33. 33.15 × 4 =
  34. 34.19 × 8 =
  35. 35.33 × 8 =
  36. 36.73 × 4 =
  37. 37.71 × 4 =
  38. 38.33 × 4 =
  39. 39.24 × 8 =
  40. 40.38 × 4 =

Answer key

  1. 144
  2. 76
  3. 148
  4. 304
  5. 196
  6. 176
  7. 296
  8. 320
  9. 224
  10. 116
  11. 48
  12. 124
  13. 216
  14. 240
  15. 108
  16. 312
  17. 128
  18. 260
  19. 112
  20. 68
  21. 84
  22. 192
  23. 160
  24. 104
  25. 120
  26. 236
  27. 136
  28. 104
  29. 180
  30. 256
  31. 156
  32. 200
  33. 60
  34. 152
  35. 264
  36. 292
  37. 284
  38. 132
  39. 192
  40. 152

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