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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 16 · 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 × 8 =
  2. 2.27 × 8 =
  3. 3.18 × 4 =
  4. 4.19 × 4 =
  5. 5.14 × 8 =
  6. 6.75 × 4 =
  7. 7.36 × 4 =
  8. 8.16 × 8 =
  9. 9.67 × 4 =
  10. 10.59 × 4 =
  11. 11.23 × 4 =
  12. 12.34 × 4 =
  13. 13.26 × 8 =
  14. 14.40 × 8 =
  15. 15.13 × 8 =
  16. 16.48 × 4 =
  17. 17.32 × 8 =
  18. 18.18 × 8 =
  19. 19.60 × 4 =
  20. 20.70 × 4 =
  21. 21.65 × 4 =
  22. 22.69 × 4 =
  23. 23.12 × 4 =
  24. 24.28 × 8 =
  25. 25.38 × 8 =
  26. 26.31 × 8 =
  27. 27.38 × 4 =
  28. 28.51 × 4 =
  29. 29.32 × 4 =
  30. 30.25 × 8 =
  31. 31.23 × 8 =
  32. 32.21 × 8 =
  33. 33.19 × 8 =
  34. 34.17 × 4 =
  35. 35.24 × 8 =
  36. 36.13 × 4 =
  37. 37.62 × 4 =
  38. 38.43 × 4 =
  39. 39.34 × 8 =
  40. 40.35 × 8 =

Answer key

  1. 136
  2. 216
  3. 72
  4. 76
  5. 112
  6. 300
  7. 144
  8. 128
  9. 268
  10. 236
  11. 92
  12. 136
  13. 208
  14. 320
  15. 104
  16. 192
  17. 256
  18. 144
  19. 240
  20. 280
  21. 260
  22. 276
  23. 48
  24. 224
  25. 304
  26. 248
  27. 152
  28. 204
  29. 128
  30. 200
  31. 184
  32. 168
  33. 152
  34. 68
  35. 192
  36. 52
  37. 248
  38. 172
  39. 272
  40. 280

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