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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 495 · 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. 1.13 × 8 =
  2. 2.17 × 4 =
  3. 3.41 × 4 =
  4. 4.69 × 4 =
  5. 5.26 × 4 =
  6. 6.55 × 4 =
  7. 7.23 × 4 =
  8. 8.70 × 4 =
  9. 9.33 × 8 =
  10. 10.18 × 8 =
  11. 11.38 × 8 =
  12. 12.19 × 4 =
  13. 13.30 × 8 =
  14. 14.35 × 8 =
  15. 15.67 × 4 =
  16. 16.21 × 4 =
  17. 17.32 × 8 =
  18. 18.59 × 4 =
  19. 19.66 × 4 =
  20. 20.28 × 8 =
  21. 21.60 × 4 =
  22. 22.27 × 8 =
  23. 23.12 × 4 =
  24. 24.58 × 4 =
  25. 25.26 × 8 =
  26. 26.16 × 8 =
  27. 27.34 × 4 =
  28. 28.25 × 8 =
  29. 29.74 × 4 =
  30. 30.37 × 4 =
  31. 31.46 × 4 =
  32. 32.16 × 4 =
  33. 33.29 × 8 =
  34. 34.14 × 8 =
  35. 35.50 × 4 =
  36. 36.52 × 4 =
  37. 37.62 × 4 =
  38. 38.35 × 4 =
  39. 39.33 × 4 =
  40. 40.63 × 4 =

Answer key

  1. 104
  2. 68
  3. 164
  4. 276
  5. 104
  6. 220
  7. 92
  8. 280
  9. 264
  10. 144
  11. 304
  12. 76
  13. 240
  14. 280
  15. 268
  16. 84
  17. 256
  18. 236
  19. 264
  20. 224
  21. 240
  22. 216
  23. 48
  24. 232
  25. 208
  26. 128
  27. 136
  28. 200
  29. 296
  30. 148
  31. 184
  32. 64
  33. 232
  34. 112
  35. 200
  36. 208
  37. 248
  38. 140
  39. 132
  40. 252

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