Пошаговое объяснение:
-1 3/8+4 7/12+(-2 5/6)=
= -1 3/8+4 7/12-2 5/6=
= -1 9/24+4 14/24-2 20/24=
= ( -1+4-2)+( -9/24+14/24-20/24)=
=1 +(-15/24)=1-5/8=8/8-5/8=3/8
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Пошаговое объяснение:
-1 3/8+4 7/12+(-2 5/6)=
= -1 3/8+4 7/12-2 5/6=
= -1 9/24+4 14/24-2 20/24=
= ( -1+4-2)+( -9/24+14/24-20/24)=
=1 +(-15/24)=1-5/8=8/8-5/8=3/8