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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 896 · 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. 1.38 × 4 =
  2. 2.25 × 4 =
  3. 3.58 × 4 =
  4. 4.22 × 8 =
  5. 5.33 × 4 =
  6. 6.31 × 8 =
  7. 7.40 × 8 =
  8. 8.57 × 4 =
  9. 9.37 × 8 =
  10. 10.52 × 4 =
  11. 11.24 × 8 =
  12. 12.20 × 8 =
  13. 13.15 × 8 =
  14. 14.46 × 4 =
  15. 15.29 × 8 =
  16. 16.32 × 4 =
  17. 17.60 × 4 =
  18. 18.65 × 4 =
  19. 19.18 × 8 =
  20. 20.20 × 4 =
  21. 21.75 × 4 =
  22. 22.26 × 4 =
  23. 23.23 × 8 =
  24. 24.16 × 8 =
  25. 25.63 × 4 =
  26. 26.35 × 4 =
  27. 27.18 × 4 =
  28. 28.35 × 8 =
  29. 29.42 × 4 =
  30. 30.12 × 4 =
  31. 31.51 × 4 =
  32. 32.19 × 4 =
  33. 33.48 × 4 =
  34. 34.13 × 8 =
  35. 35.19 × 8 =
  36. 36.34 × 4 =
  37. 37.41 × 4 =
  38. 38.13 × 4 =
  39. 39.38 × 8 =
  40. 40.33 × 8 =

Answer key

  1. 152
  2. 100
  3. 232
  4. 176
  5. 132
  6. 248
  7. 320
  8. 228
  9. 296
  10. 208
  11. 192
  12. 160
  13. 120
  14. 184
  15. 232
  16. 128
  17. 240
  18. 260
  19. 144
  20. 80
  21. 300
  22. 104
  23. 184
  24. 128
  25. 252
  26. 140
  27. 72
  28. 280
  29. 168
  30. 48
  31. 204
  32. 76
  33. 192
  34. 104
  35. 152
  36. 136
  37. 164
  38. 52
  39. 304
  40. 264

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