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8b - margföldun inn í sviga(dreifiregla)
  • 1. 7(x+6) =
A) 7x + 42
B) 7x + 13
C) 7x + 6
D) x + 42
  • 2. 3(x - 8) =
A) 3x + 24
B) 3x + 8
C) 3x - 8
D) 3x - 24
  • 3. 7(5 + x) =
A) 2 + 7x
B) 35 + 7x
C) 35 + x
D) 12 + x
  • 4. 8(4x + 9) =
A) 32x + 9
B) 12x + 17
C) 12x + 72
D) 32x + 72
  • 5. 3(7x - 8) =
A) 13x
B) 21x - 24
C) 21x - 8
D) 7x - 24
  • 6. 9(3x + 4y + 2) =
A) 27x + 4y + 2
B) 27x + 36y + 18
C) 63xy + 18
D) 27x + 36y + 2
  • 7. m(3n + 7) =
A) 3mn + 7
B) 3m + 21n
C) 3mn + 7m
D) 3m + 7n
  • 8. x(2y - 3) =
A) 2xy - 3x
B) 2y - 3x
C) 2xy - 3
D) 2xy + 3x
  • 9. m(3n - 9) =
A) 3mn - 9n
B) 3mn - 9
C) 3mn + 9m
D) 3mn - 9m
  • 10. 7(x + 4) =
A) -7x + 4
B) 7x - 28
C) 7x + 28
D) 7x + 4
  • 11. 3(2x + 8) =
A) -6x + 8
B) 6x - 24
C) 6x + 24
D) -6x + 24
  • 12. 8(-4m+2n) =
A) -32m +2n
B) 32m + 16n
C) -32m + 16n
D) 32m -16n
  • 13. 9(2m + 5n + 10) =
A) 18m + 5n + 90
B) 18m - 45n - 90
C) 18m + 5n + 10
D) 18m + 45n + 90
  • 14. 3(2x - 8y - 9) =
A) -6x - 24y - 9
B) 6x - 8y - 9
C) 6x - 24y - 27
D) 6x + 24y + 27
  • 15. -5(2a + 3b) =
A) -10a - 3b
B) 10a + 3b
C) 10a - 15b
D) -10a - 15b
  • 16. 2(x + 9y - 8) =
A) -2x + 18y + 16
B) -2x - 9y + 16
C) -2x + 9y - 8
D) 2x + 18y - 16
  • 17. 1(3x - 4y + 5) =
A) 3x - 4y + 5
B) 2x - 5y + 4
C) -3x - 4y - 5
D) -3x + 4y + 5
  • 18. 7(3m - 4n + 8) =
A) -21m - 4n + 8
B) 21m + 28n - 56
C) -21m - 28n - 56
D) 21m - 28n + 56
  • 19. 4(3w - 4t) =
A) 12w - 16t
B) -4wt
C) 12w + 16t
D) 4wt
  • 20. x(y - 3z) =
A) -xy - 3z
B) xy - 3xz
C) -xy - 3xz
D) xy + 3xz
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