ա․ -3/4*(-2/5)=-2/5*(-3/4)
3*2/4*5=6/20
2*3/5*4=6/20
բ․ -2/3*3/5=3/5*(-2/3)
-2*3/3*5= -6/15
-3*2/5*3= -6/15
գ․ 5/6*(-7/6)=-7/6*5/6
-5*7/6*6= -35/36
-7*5/6*6= -35/36
դ․ -2 1/2 * (-3 8/9)=(-3 8/9)*(-2 1/2)
-2 1/2 * (-3 8/9)= -5/2*(-35/9)=175/18
(-3 8/9)*(-2 1/2)=(-35/9)*(-5/2)=175/18
ա․ (-1/2)+11/2+(3/4)= -1/2+(11/2)+(-3/4))
(-1/2)+11/2+(3/4)=4 1/4
1) 11/2-1/2=10/2=5
2) 5/1-3/4=20-3/4=17/4=4 1/4
-1/2+(11/2)+(-3/4))= 4 1/4
1) 11/2-3/4=22-3/4=19/4
2) 19/4-1/2=19-2/4=17/4= 4 1/4
բ․ (7/8+(-5/12))+(-5/6)=7/8+((-5/12)+(-5/6))
(7/8+(-5/12))+(-5/6)=
1) 7/8-5/12=21-10/24=11/24
2) 11/24-5/6=11-20/24= -9/24
7/8+((-5/12)+(-5/6))=
1) -(5/12+5/6)= -5+10/12= -15/12
2) -15/12+7/8= -(15/12-7/8)=30-21/24= -9/24
գ․ (-2/5+(-3/10))+(-7/15)= -2/5+((-3/10)+(-7/15))
(-2/5+(-3/10))+(-7/15)=
1) -(2/5+3/10)= -4+3/10= -7/10
2) -7/10+(-7/15)= -21+14/30= -35/30
-2/5+((-3/10)+(-7/15))=
1) -(3/10+7/15)= -9+14/30= -23/30
2) -(23/30+2/5)= -23+12/30= -35/30
(-2/9+(-5/6))+2/3= (-2/9)+((-5/6)+2/3)
(-2/9+(-5/6))+2/3=
1) -(2/9+5/6)= -4+15/18= -19/18
2) -(19/18-2/3)=-19-12/18= -7/18
(-2/9)+((-5/6)+2/3)=
1) -(5/6-2/3)= -5-4/6= -1/6
2) (-2/9)+(-1/6)= -4+3/18= -7/18
ա․ -3 8/9+(-4 5/12)= -7 47/36
-7 47/36+ 2 4/15=-(7 47/36-2 4/15)= -5 187/180= -6 7/180
-(4 5/12-2 4/15)= -2 25-16/60= -2 9/60= -2 3/20
-(2 3/20+3 8/9)= -5 27+160/180= -5 187/180=-6 7/180
բ․ 10 17/30-8 9/25= 2 85-54/150=2 31/150
-(12 11/20-2 31/150)= -10 165-62/300= -10 103/300
-8 9/25+(-12 11/20)= -20 36+55/100= -20 91/100
-(20 91/100-10 17/30)= 10 273-170/300
- I-3*4I=I-3I*I4I
I-12I=3*4
12=12 - I5*4I=I5I*I4I
I20I= 5*4
20=20 - I-10*5I=I-10I*I5I
I-50I=10*5
50=50
10-999= -(999-10)= -989
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