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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 46 · 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. 1.16 × 8 =
  2. 2.12 × 8 =
  3. 3.37 × 8 =
  4. 4.39 × 4 =
  5. 5.53 × 4 =
  6. 6.33 × 8 =
  7. 7.20 × 8 =
  8. 8.48 × 4 =
  9. 9.23 × 4 =
  10. 10.19 × 8 =
  11. 11.64 × 4 =
  12. 12.34 × 8 =
  13. 13.23 × 8 =
  14. 14.28 × 8 =
  15. 15.30 × 8 =
  16. 16.75 × 4 =
  17. 17.24 × 8 =
  18. 18.21 × 8 =
  19. 19.34 × 4 =
  20. 20.35 × 4 =
  21. 21.33 × 4 =
  22. 22.42 × 4 =
  23. 23.15 × 8 =
  24. 24.13 × 4 =
  25. 25.44 × 4 =
  26. 26.27 × 4 =
  27. 27.29 × 4 =
  28. 28.30 × 4 =
  29. 29.26 × 4 =
  30. 30.66 × 4 =
  31. 31.25 × 8 =
  32. 32.19 × 4 =
  33. 33.13 × 8 =
  34. 34.50 × 4 =
  35. 35.36 × 4 =
  36. 36.62 × 4 =
  37. 37.26 × 8 =
  38. 38.54 × 4 =
  39. 39.55 × 4 =
  40. 40.63 × 4 =

Answer key

  1. 128
  2. 96
  3. 296
  4. 156
  5. 212
  6. 264
  7. 160
  8. 192
  9. 92
  10. 152
  11. 256
  12. 272
  13. 184
  14. 224
  15. 240
  16. 300
  17. 192
  18. 168
  19. 136
  20. 140
  21. 132
  22. 168
  23. 120
  24. 52
  25. 176
  26. 108
  27. 116
  28. 120
  29. 104
  30. 264
  31. 200
  32. 76
  33. 104
  34. 200
  35. 144
  36. 248
  37. 208
  38. 216
  39. 220
  40. 252

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