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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 310 · 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. 1.39 × 4 =
  2. 2.18 × 8 =
  3. 3.24 × 8 =
  4. 4.26 × 8 =
  5. 5.23 × 8 =
  6. 6.35 × 8 =
  7. 7.33 × 4 =
  8. 8.25 × 4 =
  9. 9.54 × 4 =
  10. 10.19 × 8 =
  11. 11.21 × 8 =
  12. 12.19 × 4 =
  13. 13.30 × 4 =
  14. 14.40 × 8 =
  15. 15.22 × 8 =
  16. 16.55 × 4 =
  17. 17.36 × 8 =
  18. 18.37 × 4 =
  19. 19.13 × 4 =
  20. 20.14 × 8 =
  21. 21.62 × 4 =
  22. 22.16 × 8 =
  23. 23.37 × 8 =
  24. 24.13 × 8 =
  25. 25.22 × 4 =
  26. 26.39 × 8 =
  27. 27.35 × 4 =
  28. 28.25 × 8 =
  29. 29.32 × 8 =
  30. 30.15 × 8 =
  31. 31.71 × 4 =
  32. 32.34 × 8 =
  33. 33.31 × 8 =
  34. 34.27 × 4 =
  35. 35.20 × 8 =
  36. 36.32 × 4 =
  37. 37.56 × 4 =
  38. 38.14 × 4 =
  39. 39.44 × 4 =
  40. 40.74 × 4 =

Answer key

  1. 156
  2. 144
  3. 192
  4. 208
  5. 184
  6. 280
  7. 132
  8. 100
  9. 216
  10. 152
  11. 168
  12. 76
  13. 120
  14. 320
  15. 176
  16. 220
  17. 288
  18. 148
  19. 52
  20. 112
  21. 248
  22. 128
  23. 296
  24. 104
  25. 88
  26. 312
  27. 140
  28. 200
  29. 256
  30. 120
  31. 284
  32. 272
  33. 248
  34. 108
  35. 160
  36. 128
  37. 224
  38. 56
  39. 176
  40. 296

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