Найдите значение выражения:
1)(-5/8)×(-4/5)×(-3/4)×(-2/3)×(-1/2);
2)(-7/12)×(-6/7)×(-5/6)×(-4/5)+2/3;
3)(-11/15)×(-10/11)×(-9/10)+(-7/9)×(-6/7)+4/15.
1)(-5/8)×(-4/5)×(-3/4)×(-2/3)×(-1/2);
2)(-7/12)×(-6/7)×(-5/6)×(-4/5)+2/3;
3)(-11/15)×(-10/11)×(-9/10)+(-7/9)×(-6/7)+4/15.
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Answers & Comments
2. (-7/12)*(-6/7)*(-5/6)*(-4/5)+2/3=1
3. (-11/15)*(-10/11)*(-9/10)+(-7/9)*(-6/7)+4/15=1/3