Пошаговое объяснение:
А)
-5/6 + 3/8 = -20/24 + 9/24 = -11/24
Б)
-2. 5/7 - 1. 3/4 =
-2. 20/28 - 1. 21/28 =
-3. 41/28 = -4. 13/28
В)
-1. 1/14 * 2. 1/3 = -15/14 * 7/3 = -5/2 * 1/1 = -5/2 = -2. 1/2 или -2,5
Г)
1. 1/7 : (-2. 2/7) = 8/7 : (-16/7) = 8/7 * (-7/16) = -8/16 = -1/2
-5/6+3/8=(-20+9)/24=11/24
-2 5/7 - 1 3/4=-19/7-7/4= ( -76-49)/28=-125/28=-4 13/28
-1 1/14*2 1/3=-15/14*7/3 = -5/2
1 1/7:(-2 2/7)=8/7: (-16 /7)=8/7*(-7/16)=-8/16=-1/2
х+3,12=-5,43
х=-5,43-3,12
х=-8,55
-8,55+3,12=-5,43
-5,43=-5,43
1 3/14-у=2 7/10
17/14-у=27/10
-у=27/10-17/14=(27*7-17*5)/70=104/70= 52/35= 1 17/35
у=-1 17/35
1 3/14+1 17/35=2 7/10
17/14+52/35= 2 7/10
(85+104)/70=189/70=2 49/70=2 7/10
2 7/10= 2 7/10
-5у+6,5=0
-5у=-6,5
у= 6,5/5= 1,3
-5*1,3+6,5=0
0=0
Пошаговое объяснение:
А)
-5/6 + 3/8 = -20/24 + 9/24 = -11/24
Б)
-2. 5/7 - 1. 3/4 =
-2. 20/28 - 1. 21/28 =
-3. 41/28 = -4. 13/28
В)
-1. 1/14 * 2. 1/3 = -15/14 * 7/3 = -5/2 * 1/1 = -5/2 = -2. 1/2 или -2,5
Г)
1. 1/7 : (-2. 2/7) = 8/7 : (-16/7) = 8/7 * (-7/16) = -8/16 = -1/2
Пошаговое объяснение:
-5/6+3/8=(-20+9)/24=11/24
-2 5/7 - 1 3/4=-19/7-7/4= ( -76-49)/28=-125/28=-4 13/28
-1 1/14*2 1/3=-15/14*7/3 = -5/2
1 1/7:(-2 2/7)=8/7: (-16 /7)=8/7*(-7/16)=-8/16=-1/2
х+3,12=-5,43
х=-5,43-3,12
х=-8,55
-8,55+3,12=-5,43
-5,43=-5,43
1 3/14-у=2 7/10
17/14-у=27/10
-у=27/10-17/14=(27*7-17*5)/70=104/70= 52/35= 1 17/35
у=-1 17/35
1 3/14+1 17/35=2 7/10
17/14+52/35= 2 7/10
(85+104)/70=189/70=2 49/70=2 7/10
2 7/10= 2 7/10
-5у+6,5=0
-5у=-6,5
у= 6,5/5= 1,3
-5*1,3+6,5=0
0=0