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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 967 · 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. 1.60 × 4 =
  2. 2.65 × 4 =
  3. 3.24 × 8 =
  4. 4.34 × 8 =
  5. 5.52 × 4 =
  6. 6.45 × 4 =
  7. 7.29 × 8 =
  8. 8.21 × 8 =
  9. 9.47 × 4 =
  10. 10.20 × 8 =
  11. 11.19 × 8 =
  12. 12.34 × 4 =
  13. 13.16 × 4 =
  14. 14.75 × 4 =
  15. 15.13 × 8 =
  16. 16.46 × 4 =
  17. 17.36 × 8 =
  18. 18.30 × 4 =
  19. 19.15 × 4 =
  20. 20.39 × 4 =
  21. 21.18 × 8 =
  22. 22.42 × 4 =
  23. 23.12 × 8 =
  24. 24.17 × 8 =
  25. 25.53 × 4 =
  26. 26.27 × 4 =
  27. 27.12 × 4 =
  28. 28.67 × 4 =
  29. 29.37 × 8 =
  30. 30.38 × 8 =
  31. 31.36 × 4 =
  32. 32.23 × 8 =
  33. 33.26 × 4 =
  34. 34.32 × 8 =
  35. 35.66 × 4 =
  36. 36.14 × 8 =
  37. 37.17 × 4 =
  38. 38.22 × 8 =
  39. 39.27 × 8 =
  40. 40.18 × 4 =

Answer key

  1. 240
  2. 260
  3. 192
  4. 272
  5. 208
  6. 180
  7. 232
  8. 168
  9. 188
  10. 160
  11. 152
  12. 136
  13. 64
  14. 300
  15. 104
  16. 184
  17. 288
  18. 120
  19. 60
  20. 156
  21. 144
  22. 168
  23. 96
  24. 136
  25. 212
  26. 108
  27. 48
  28. 268
  29. 296
  30. 304
  31. 144
  32. 184
  33. 104
  34. 256
  35. 264
  36. 112
  37. 68
  38. 176
  39. 216
  40. 72

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