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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 120 · 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. 1.18 × 8 =
  2. 2.54 × 4 =
  3. 3.14 × 8 =
  4. 4.26 × 4 =
  5. 5.66 × 4 =
  6. 6.28 × 8 =
  7. 7.25 × 8 =
  8. 8.15 × 4 =
  9. 9.17 × 4 =
  10. 10.52 × 4 =
  11. 11.35 × 8 =
  12. 12.49 × 4 =
  13. 13.58 × 4 =
  14. 14.30 × 8 =
  15. 15.24 × 4 =
  16. 16.26 × 8 =
  17. 17.24 × 8 =
  18. 18.16 × 8 =
  19. 19.43 × 4 =
  20. 20.40 × 8 =
  21. 21.23 × 8 =
  22. 22.47 × 4 =
  23. 23.38 × 8 =
  24. 24.19 × 4 =
  25. 25.20 × 8 =
  26. 26.22 × 4 =
  27. 27.22 × 8 =
  28. 28.31 × 8 =
  29. 29.34 × 8 =
  30. 30.29 × 4 =
  31. 31.27 × 8 =
  32. 32.60 × 4 =
  33. 33.41 × 4 =
  34. 34.39 × 8 =
  35. 35.36 × 8 =
  36. 36.33 × 4 =
  37. 37.32 × 8 =
  38. 38.33 × 8 =
  39. 39.21 × 8 =
  40. 40.72 × 4 =

Answer key

  1. 144
  2. 216
  3. 112
  4. 104
  5. 264
  6. 224
  7. 200
  8. 60
  9. 68
  10. 208
  11. 280
  12. 196
  13. 232
  14. 240
  15. 96
  16. 208
  17. 192
  18. 128
  19. 172
  20. 320
  21. 184
  22. 188
  23. 304
  24. 76
  25. 160
  26. 88
  27. 176
  28. 248
  29. 272
  30. 116
  31. 216
  32. 240
  33. 164
  34. 312
  35. 288
  36. 132
  37. 256
  38. 264
  39. 168
  40. 288

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