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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 93 · 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. 1.17 × 4 =
  2. 2.64 × 4 =
  3. 3.14 × 4 =
  4. 4.17 × 8 =
  5. 5.73 × 4 =
  6. 6.74 × 4 =
  7. 7.15 × 4 =
  8. 8.25 × 4 =
  9. 9.28 × 8 =
  10. 10.29 × 8 =
  11. 11.31 × 4 =
  12. 12.16 × 4 =
  13. 13.39 × 4 =
  14. 14.24 × 4 =
  15. 15.40 × 4 =
  16. 16.35 × 8 =
  17. 17.65 × 4 =
  18. 18.18 × 8 =
  19. 19.61 × 4 =
  20. 20.20 × 8 =
  21. 21.21 × 4 =
  22. 22.56 × 4 =
  23. 23.34 × 4 =
  24. 24.14 × 8 =
  25. 25.32 × 8 =
  26. 26.25 × 8 =
  27. 27.48 × 4 =
  28. 28.55 × 4 =
  29. 29.47 × 4 =
  30. 30.40 × 8 =
  31. 31.43 × 4 =
  32. 32.46 × 4 =
  33. 33.27 × 8 =
  34. 34.72 × 4 =
  35. 35.28 × 4 =
  36. 36.60 × 4 =
  37. 37.29 × 4 =
  38. 38.69 × 4 =
  39. 39.32 × 4 =
  40. 40.62 × 4 =

Answer key

  1. 68
  2. 256
  3. 56
  4. 136
  5. 292
  6. 296
  7. 60
  8. 100
  9. 224
  10. 232
  11. 124
  12. 64
  13. 156
  14. 96
  15. 160
  16. 280
  17. 260
  18. 144
  19. 244
  20. 160
  21. 84
  22. 224
  23. 136
  24. 112
  25. 256
  26. 200
  27. 192
  28. 220
  29. 188
  30. 320
  31. 172
  32. 184
  33. 216
  34. 288
  35. 112
  36. 240
  37. 116
  38. 276
  39. 128
  40. 248

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