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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 973 · 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. 1.73 × 4 =
  2. 2.38 × 8 =
  3. 3.19 × 8 =
  4. 4.13 × 4 =
  5. 5.38 × 4 =
  6. 6.34 × 8 =
  7. 7.23 × 8 =
  8. 8.63 × 4 =
  9. 9.17 × 4 =
  10. 10.22 × 8 =
  11. 11.26 × 8 =
  12. 12.18 × 8 =
  13. 13.40 × 4 =
  14. 14.13 × 8 =
  15. 15.24 × 4 =
  16. 16.19 × 4 =
  17. 17.20 × 8 =
  18. 18.21 × 8 =
  19. 19.20 × 4 =
  20. 20.50 × 4 =
  21. 21.57 × 4 =
  22. 22.28 × 4 =
  23. 23.46 × 4 =
  24. 24.70 × 4 =
  25. 25.14 × 8 =
  26. 26.42 × 4 =
  27. 27.43 × 4 =
  28. 28.39 × 8 =
  29. 29.36 × 8 =
  30. 30.33 × 8 =
  31. 31.16 × 4 =
  32. 32.60 × 4 =
  33. 33.26 × 4 =
  34. 34.12 × 8 =
  35. 35.33 × 4 =
  36. 36.67 × 4 =
  37. 37.65 × 4 =
  38. 38.27 × 8 =
  39. 39.37 × 8 =
  40. 40.28 × 8 =

Answer key

  1. 292
  2. 304
  3. 152
  4. 52
  5. 152
  6. 272
  7. 184
  8. 252
  9. 68
  10. 176
  11. 208
  12. 144
  13. 160
  14. 104
  15. 96
  16. 76
  17. 160
  18. 168
  19. 80
  20. 200
  21. 228
  22. 112
  23. 184
  24. 280
  25. 112
  26. 168
  27. 172
  28. 312
  29. 288
  30. 264
  31. 64
  32. 240
  33. 104
  34. 96
  35. 132
  36. 268
  37. 260
  38. 216
  39. 296
  40. 224

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