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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 575 · 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. 1.37 × 8 =
  2. 2.41 × 4 =
  3. 3.14 × 8 =
  4. 4.71 × 4 =
  5. 5.18 × 4 =
  6. 6.54 × 4 =
  7. 7.32 × 4 =
  8. 8.13 × 8 =
  9. 9.35 × 8 =
  10. 10.36 × 4 =
  11. 11.20 × 4 =
  12. 12.22 × 4 =
  13. 13.16 × 4 =
  14. 14.35 × 4 =
  15. 15.22 × 8 =
  16. 16.33 × 4 =
  17. 17.17 × 4 =
  18. 18.45 × 4 =
  19. 19.16 × 8 =
  20. 20.40 × 4 =
  21. 21.21 × 8 =
  22. 22.20 × 8 =
  23. 23.30 × 8 =
  24. 24.73 × 4 =
  25. 25.36 × 8 =
  26. 26.12 × 4 =
  27. 27.28 × 8 =
  28. 28.60 × 4 =
  29. 29.19 × 4 =
  30. 30.37 × 4 =
  31. 31.44 × 4 =
  32. 32.43 × 4 =
  33. 33.62 × 4 =
  34. 34.65 × 4 =
  35. 35.29 × 4 =
  36. 36.39 × 8 =
  37. 37.12 × 8 =
  38. 38.74 × 4 =
  39. 39.72 × 4 =
  40. 40.34 × 8 =

Answer key

  1. 296
  2. 164
  3. 112
  4. 284
  5. 72
  6. 216
  7. 128
  8. 104
  9. 280
  10. 144
  11. 80
  12. 88
  13. 64
  14. 140
  15. 176
  16. 132
  17. 68
  18. 180
  19. 128
  20. 160
  21. 168
  22. 160
  23. 240
  24. 292
  25. 288
  26. 48
  27. 224
  28. 240
  29. 76
  30. 148
  31. 176
  32. 172
  33. 248
  34. 260
  35. 116
  36. 312
  37. 96
  38. 296
  39. 288
  40. 272

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