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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 937 · 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. 1.35 × 8 =
  2. 2.22 × 8 =
  3. 3.22 × 4 =
  4. 4.19 × 8 =
  5. 5.18 × 8 =
  6. 6.39 × 8 =
  7. 7.13 × 8 =
  8. 8.20 × 8 =
  9. 9.70 × 4 =
  10. 10.57 × 4 =
  11. 11.56 × 4 =
  12. 12.45 × 4 =
  13. 13.60 × 4 =
  14. 14.20 × 4 =
  15. 15.15 × 8 =
  16. 16.51 × 4 =
  17. 17.12 × 4 =
  18. 18.19 × 4 =
  19. 19.43 × 4 =
  20. 20.62 × 4 =
  21. 21.49 × 4 =
  22. 22.38 × 8 =
  23. 23.48 × 4 =
  24. 24.25 × 4 =
  25. 25.42 × 4 =
  26. 26.21 × 4 =
  27. 27.17 × 8 =
  28. 28.14 × 8 =
  29. 29.14 × 4 =
  30. 30.75 × 4 =
  31. 31.29 × 8 =
  32. 32.34 × 4 =
  33. 33.50 × 4 =
  34. 34.33 × 4 =
  35. 35.66 × 4 =
  36. 36.27 × 8 =
  37. 37.34 × 8 =
  38. 38.72 × 4 =
  39. 39.53 × 4 =
  40. 40.54 × 4 =

Answer key

  1. 280
  2. 176
  3. 88
  4. 152
  5. 144
  6. 312
  7. 104
  8. 160
  9. 280
  10. 228
  11. 224
  12. 180
  13. 240
  14. 80
  15. 120
  16. 204
  17. 48
  18. 76
  19. 172
  20. 248
  21. 196
  22. 304
  23. 192
  24. 100
  25. 168
  26. 84
  27. 136
  28. 112
  29. 56
  30. 300
  31. 232
  32. 136
  33. 200
  34. 132
  35. 264
  36. 216
  37. 272
  38. 288
  39. 212
  40. 216

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