<p>Выполните действия. <br />1) 6(4/15) - 2(1/9) + 1(3/10) = 6(?/90) - 2(?/90) + 1(?/90) = <br />2) 7(2/3) - 5(5/36) + 3(3/8) = <br />3) 10(9/22) - 3(7/11) - 4(8/33) = <br />4) 12(17/42) - (3(1/4) + 4(1/6)) = <br />5) 15 - (6(4/35) - 2(3/14)) =</p>

1) 6(4/15) - 2(1/9) + 1(3/10) = 6(24/90) - 2(10/90) + 1(27/90) = 5(41/90).
2) 7(2/3) - 5(5/36) + 3(3/8) = 7(48/72) - 5(10/72) + 3(27/72) = 5(65/72).
3) 10(9/22) - 3(7/11) - 4(8/33) = 10(27/66) - 3(42/66) - 4(16/66) = 2(35/66).
4) 12(17/42) - (3(1/4) + 4(1/6)) = 12(17/42) - (3(3/12) + 4(2/12)) = 12(17/42) - 7(5/12) = 4(83/84).
5) 15 - (6(4/35) - 2(3/14)) = 15 - (6(8/70) - 2(15/70)) = 15 - 3(63/70) = 11(1/10).