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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 884 · 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. 1.23 × 8 =
  2. 2.52 × 4 =
  3. 3.40 × 8 =
  4. 4.12 × 4 =
  5. 5.39 × 8 =
  6. 6.38 × 8 =
  7. 7.31 × 8 =
  8. 8.31 × 4 =
  9. 9.30 × 4 =
  10. 10.61 × 4 =
  11. 11.32 × 8 =
  12. 12.73 × 4 =
  13. 13.24 × 8 =
  14. 14.57 × 4 =
  15. 15.18 × 8 =
  16. 16.19 × 4 =
  17. 17.16 × 8 =
  18. 18.17 × 8 =
  19. 19.21 × 8 =
  20. 20.58 × 4 =
  21. 21.33 × 4 =
  22. 22.44 × 4 =
  23. 23.40 × 4 =
  24. 24.28 × 4 =
  25. 25.50 × 4 =
  26. 26.54 × 4 =
  27. 27.36 × 4 =
  28. 28.29 × 4 =
  29. 29.55 × 4 =
  30. 30.26 × 8 =
  31. 31.49 × 4 =
  32. 32.64 × 4 =
  33. 33.39 × 4 =
  34. 34.25 × 8 =
  35. 35.70 × 4 =
  36. 36.13 × 4 =
  37. 37.20 × 8 =
  38. 38.37 × 4 =
  39. 39.37 × 8 =
  40. 40.15 × 4 =

Answer key

  1. 184
  2. 208
  3. 320
  4. 48
  5. 312
  6. 304
  7. 248
  8. 124
  9. 120
  10. 244
  11. 256
  12. 292
  13. 192
  14. 228
  15. 144
  16. 76
  17. 128
  18. 136
  19. 168
  20. 232
  21. 132
  22. 176
  23. 160
  24. 112
  25. 200
  26. 216
  27. 144
  28. 116
  29. 220
  30. 208
  31. 196
  32. 256
  33. 156
  34. 200
  35. 280
  36. 52
  37. 160
  38. 148
  39. 296
  40. 60

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