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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 977 · 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. 1.17 × 8 =
  2. 2.34 × 4 =
  3. 3.21 × 4 =
  4. 4.66 × 4 =
  5. 5.30 × 4 =
  6. 6.13 × 8 =
  7. 7.12 × 8 =
  8. 8.39 × 8 =
  9. 9.22 × 8 =
  10. 10.31 × 4 =
  11. 11.18 × 4 =
  12. 12.20 × 8 =
  13. 13.39 × 4 =
  14. 14.19 × 4 =
  15. 15.31 × 8 =
  16. 16.33 × 4 =
  17. 17.28 × 4 =
  18. 18.30 × 8 =
  19. 19.27 × 8 =
  20. 20.34 × 8 =
  21. 21.46 × 4 =
  22. 22.52 × 4 =
  23. 23.58 × 4 =
  24. 24.29 × 4 =
  25. 25.73 × 4 =
  26. 26.22 × 4 =
  27. 27.32 × 8 =
  28. 28.36 × 8 =
  29. 29.35 × 8 =
  30. 30.23 × 8 =
  31. 31.57 × 4 =
  32. 32.67 × 4 =
  33. 33.18 × 8 =
  34. 34.25 × 8 =
  35. 35.24 × 8 =
  36. 36.35 × 4 =
  37. 37.25 × 4 =
  38. 38.53 × 4 =
  39. 39.47 × 4 =
  40. 40.14 × 4 =

Answer key

  1. 136
  2. 136
  3. 84
  4. 264
  5. 120
  6. 104
  7. 96
  8. 312
  9. 176
  10. 124
  11. 72
  12. 160
  13. 156
  14. 76
  15. 248
  16. 132
  17. 112
  18. 240
  19. 216
  20. 272
  21. 184
  22. 208
  23. 232
  24. 116
  25. 292
  26. 88
  27. 256
  28. 288
  29. 280
  30. 184
  31. 228
  32. 268
  33. 144
  34. 200
  35. 192
  36. 140
  37. 100
  38. 212
  39. 188
  40. 56

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