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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 638 · 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. 1.13 × 8 =
  2. 2.73 × 4 =
  3. 3.23 × 8 =
  4. 4.32 × 8 =
  5. 5.25 × 4 =
  6. 6.20 × 8 =
  7. 7.29 × 4 =
  8. 8.21 × 8 =
  9. 9.16 × 8 =
  10. 10.39 × 4 =
  11. 11.21 × 4 =
  12. 12.45 × 4 =
  13. 13.53 × 4 =
  14. 14.56 × 4 =
  15. 15.15 × 8 =
  16. 16.28 × 8 =
  17. 17.25 × 8 =
  18. 18.70 × 4 =
  19. 19.12 × 8 =
  20. 20.26 × 8 =
  21. 21.60 × 4 =
  22. 22.15 × 4 =
  23. 23.18 × 8 =
  24. 24.14 × 8 =
  25. 25.69 × 4 =
  26. 26.30 × 8 =
  27. 27.26 × 4 =
  28. 28.37 × 4 =
  29. 29.48 × 4 =
  30. 30.27 × 8 =
  31. 31.59 × 4 =
  32. 32.32 × 4 =
  33. 33.31 × 8 =
  34. 34.27 × 4 =
  35. 35.29 × 8 =
  36. 36.34 × 4 =
  37. 37.57 × 4 =
  38. 38.19 × 8 =
  39. 39.22 × 8 =
  40. 40.12 × 4 =

Answer key

  1. 104
  2. 292
  3. 184
  4. 256
  5. 100
  6. 160
  7. 116
  8. 168
  9. 128
  10. 156
  11. 84
  12. 180
  13. 212
  14. 224
  15. 120
  16. 224
  17. 200
  18. 280
  19. 96
  20. 208
  21. 240
  22. 60
  23. 144
  24. 112
  25. 276
  26. 240
  27. 104
  28. 148
  29. 192
  30. 216
  31. 236
  32. 128
  33. 248
  34. 108
  35. 232
  36. 136
  37. 228
  38. 152
  39. 176
  40. 48

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