Пошаговое объяснение:
(0.2-7/15) · (-5/6) - (-5/12 - 0.75) : 2 1/3 =
(1/5 - 7/15) *(-5/6) - (- 5/12 - 3/4) : 7/3=
(3/15 -7/15) * (-5/6) - (-5/12 -9/12) *3/7=
-4/15 *(-5/6) -(-7/6) * 3/7= 20/60 -(-21/42)= 1/3+1/3=2/3
2.
-4 1/4 *(-2.5) *1.6 / 0.5 *2 1/4 *(-8.8)=
-17/4*(-25/10)*16/10 /1/2*21/4 *(-88/10)=
17/8 * 8/5 /21/8*(-44/5)= 17/5 / -924/40=17/5 *(-5/308)= - 17/308
4.
аb : (c-d)
((-3.5) *-1/3) : (-7.1 - (-6.4))=
(-35/10 *(-1/3)) : (-71/10 +64/10)=
7/6 : (-7/10)= 7/6* (-10/7)= -5/3= - 1 2/3
Пошаговое объяснение:
(0.2-7/15) · (-5/6) - (-5/12 - 0.75) : 2 1/3 =
(1/5 - 7/15) *(-5/6) - (- 5/12 - 3/4) : 7/3=
(3/15 -7/15) * (-5/6) - (-5/12 -9/12) *3/7=
-4/15 *(-5/6) -(-7/6) * 3/7= 20/60 -(-21/42)= 1/3+1/3=2/3
2.
-4 1/4 *(-2.5) *1.6 / 0.5 *2 1/4 *(-8.8)=
-17/4*(-25/10)*16/10 /1/2*21/4 *(-88/10)=
17/8 * 8/5 /21/8*(-44/5)= 17/5 / -924/40=17/5 *(-5/308)= - 17/308
4.
аb : (c-d)
((-3.5) *-1/3) : (-7.1 - (-6.4))=
(-35/10 *(-1/3)) : (-71/10 +64/10)=
7/6 : (-7/10)= 7/6* (-10/7)= -5/3= - 1 2/3