1)-50,2)4 2/11,3)-7 1/3,4)3
Пошаговое объяснение:
1)-6 3/4*5 1/3=-27/4*16/3=-432/12=-36*12/12=-36
4 1/3*3 3/13=13/3*42/13=546/39=14
-36-14=-(36+14)=-50;
2)-2 1/6+1/4=1/4-2 1/6=1/4-13/6=3/12-26/12=-23/12=-1 11/12
-1 11/12*(-2 2/11)=-23/12*24/11=552/132=46/11=4 2/11;
3)3 6/7*(-2 1/3)=-3 6/7*2 1/3=-27/7*7/3=-189/21=-9
8/9*(-1 7/8)=-8/9*15/8=-120/72=-5/3=-1 2/3
-9-(-1 2/3)=-9+1 2/3=1 2/3-9=2/3-8=2/3-24/3=-22/3=-7 1/3
4)-8 3/8+7 1/6=7 1/6-8 3/8=43/6-67/8=172/24-201/24=-29/24=-1 5/24
-1 5/24*(-2 14/29)=1 5/24*2 14/29=29/24*72/29=2088/696=3*696/696=3
1)3.7(-5.02)=-18.574
18.605:6.1=3.05
-5.2:0.04=-130
2)3,5х-2,8=1,4х+1,4
3,5x-1,4x=1,4+2,8
2,1x=4,2
x=2
ответ: x=2.
3) 5/9=0.(5)
13/99=0.(13)
25/11= 2,(27)
4)а = 4,8394 ~ 4,84
b = 1,783 ~ 1,78
a + b = 4,84 + 1,78 = 6,62
a -b = 4,84 - 1,78 = 3,06
a = 45,394 ~ 45,40
b = 23,727 ~ 23,73
a + b = 45,40 + 23,73 = 69,13
a - b = 45,40 - 23,73 = 21,67
5)а = 25,19 ≈ 25,19, в = 4,354 ≈ 4,35,
а * в = 25,19 * 4,35 ≈ 109,58,
а : в = 25,19 : 4,35 ≈ 5,79
б)
а = 53,74 ≈ 53,74, в = 6,637 ≈ 6,64,
а * в = 53,74 * 6,64 ≈ 356,83,
а : в = 53,74 : 6,64 ≈ 8,09
1)-50,2)4 2/11,3)-7 1/3,4)3
Пошаговое объяснение:
1)-6 3/4*5 1/3=-27/4*16/3=-432/12=-36*12/12=-36
4 1/3*3 3/13=13/3*42/13=546/39=14
-36-14=-(36+14)=-50;
2)-2 1/6+1/4=1/4-2 1/6=1/4-13/6=3/12-26/12=-23/12=-1 11/12
-1 11/12*(-2 2/11)=-23/12*24/11=552/132=46/11=4 2/11;
3)3 6/7*(-2 1/3)=-3 6/7*2 1/3=-27/7*7/3=-189/21=-9
8/9*(-1 7/8)=-8/9*15/8=-120/72=-5/3=-1 2/3
-9-(-1 2/3)=-9+1 2/3=1 2/3-9=2/3-8=2/3-24/3=-22/3=-7 1/3
4)-8 3/8+7 1/6=7 1/6-8 3/8=43/6-67/8=172/24-201/24=-29/24=-1 5/24
-1 5/24*(-2 14/29)=1 5/24*2 14/29=29/24*72/29=2088/696=3*696/696=3
1)3.7(-5.02)=-18.574
18.605:6.1=3.05
-5.2:0.04=-130
Пошаговое объяснение:
2)3,5х-2,8=1,4х+1,4
3,5x-1,4x=1,4+2,8
2,1x=4,2
x=2
ответ: x=2.
3) 5/9=0.(5)
13/99=0.(13)
25/11= 2,(27)
4)а = 4,8394 ~ 4,84
b = 1,783 ~ 1,78
a + b = 4,84 + 1,78 = 6,62
a -b = 4,84 - 1,78 = 3,06
a = 45,394 ~ 45,40
b = 23,727 ~ 23,73
a + b = 45,40 + 23,73 = 69,13
a - b = 45,40 - 23,73 = 21,67
5)а = 25,19 ≈ 25,19, в = 4,354 ≈ 4,35,
а * в = 25,19 * 4,35 ≈ 109,58,
а : в = 25,19 : 4,35 ≈ 5,79
б)
а = 53,74 ≈ 53,74, в = 6,637 ≈ 6,64,
а * в = 53,74 * 6,64 ≈ 356,83,
а : в = 53,74 : 6,64 ≈ 8,09