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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 958 · 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. 1.19 × 4 =
  2. 2.18 × 8 =
  3. 3.29 × 8 =
  4. 4.72 × 4 =
  5. 5.15 × 8 =
  6. 6.44 × 4 =
  7. 7.16 × 8 =
  8. 8.33 × 8 =
  9. 9.66 × 4 =
  10. 10.37 × 8 =
  11. 11.39 × 8 =
  12. 12.27 × 8 =
  13. 13.27 × 4 =
  14. 14.23 × 8 =
  15. 15.22 × 8 =
  16. 16.57 × 4 =
  17. 17.19 × 8 =
  18. 18.71 × 4 =
  19. 19.74 × 4 =
  20. 20.35 × 8 =
  21. 21.24 × 8 =
  22. 22.30 × 8 =
  23. 23.62 × 4 =
  24. 24.31 × 8 =
  25. 25.12 × 8 =
  26. 26.60 × 4 =
  27. 27.35 × 4 =
  28. 28.26 × 4 =
  29. 29.20 × 8 =
  30. 30.37 × 4 =
  31. 31.75 × 4 =
  32. 32.33 × 4 =
  33. 33.25 × 8 =
  34. 34.64 × 4 =
  35. 35.14 × 8 =
  36. 36.25 × 4 =
  37. 37.50 × 4 =
  38. 38.34 × 8 =
  39. 39.55 × 4 =
  40. 40.69 × 4 =

Answer key

  1. 76
  2. 144
  3. 232
  4. 288
  5. 120
  6. 176
  7. 128
  8. 264
  9. 264
  10. 296
  11. 312
  12. 216
  13. 108
  14. 184
  15. 176
  16. 228
  17. 152
  18. 284
  19. 296
  20. 280
  21. 192
  22. 240
  23. 248
  24. 248
  25. 96
  26. 240
  27. 140
  28. 104
  29. 160
  30. 148
  31. 300
  32. 132
  33. 200
  34. 256
  35. 112
  36. 100
  37. 200
  38. 272
  39. 220
  40. 276

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