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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 371 · 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. 1.12 × 8 =
  2. 2.56 × 4 =
  3. 3.23 × 8 =
  4. 4.24 × 4 =
  5. 5.55 × 4 =
  6. 6.13 × 8 =
  7. 7.36 × 4 =
  8. 8.21 × 8 =
  9. 9.45 × 4 =
  10. 10.60 × 4 =
  11. 11.67 × 4 =
  12. 12.39 × 8 =
  13. 13.38 × 4 =
  14. 14.25 × 4 =
  15. 15.75 × 4 =
  16. 16.32 × 8 =
  17. 17.26 × 8 =
  18. 18.32 × 4 =
  19. 19.14 × 8 =
  20. 20.28 × 4 =
  21. 21.21 × 4 =
  22. 22.51 × 4 =
  23. 23.27 × 8 =
  24. 24.65 × 4 =
  25. 25.68 × 4 =
  26. 26.30 × 8 =
  27. 27.43 × 4 =
  28. 28.12 × 4 =
  29. 29.17 × 4 =
  30. 30.62 × 4 =
  31. 31.38 × 8 =
  32. 32.18 × 8 =
  33. 33.15 × 8 =
  34. 34.23 × 4 =
  35. 35.34 × 4 =
  36. 36.59 × 4 =
  37. 37.49 × 4 =
  38. 38.50 × 4 =
  39. 39.16 × 4 =
  40. 40.19 × 8 =

Answer key

  1. 96
  2. 224
  3. 184
  4. 96
  5. 220
  6. 104
  7. 144
  8. 168
  9. 180
  10. 240
  11. 268
  12. 312
  13. 152
  14. 100
  15. 300
  16. 256
  17. 208
  18. 128
  19. 112
  20. 112
  21. 84
  22. 204
  23. 216
  24. 260
  25. 272
  26. 240
  27. 172
  28. 48
  29. 68
  30. 248
  31. 304
  32. 144
  33. 120
  34. 92
  35. 136
  36. 236
  37. 196
  38. 200
  39. 64
  40. 152

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