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a) (3/4-1/5):1/2=
b) 3,2:(0,8-2/5)=
c) 2/3*(1/2-1/6)=
d)4,8+1/3*(1/2-0,6)=
e) (1-7/9)*(5,2-0,7)=
f) 123:10+0,2*6,1=
g) (6,5-4,7):(4-2 1/5)=
h) (1,5-1 1/3)*2 2/5-0,1=
i) (6,25-2 1/2):2 1/7-1=
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a) (3/4-1/5):1/2=(15/20-4/20)÷½=11/20×2=1,1
b) 3,2:(0,8-2/5)=3,2÷(4/5-2/5)=3,2÷0,2=16
c) 2/3*(1/2-1/6)=2/3×(3/6-1/6)=2/3×2/6=4/18=2/9
d)4,8+1/3*(1/2-0,6)=4,8+1/3×(-1/10)=4,8+1/30=144/30+1/30=145/30=29/6=4⅚
e) (1-7/9)*(5,2-0,7)=2/9×4,5=2/9×45/10=5/5=1
f) 123:10+0,2*6,1=12,3+1,22=13,52
g) (6,5-4,7):(4-2 1/5)=1,8÷1⅘=1,8÷1,8=1
h) (1,5-1 1/3)*2 2/5-0,1=(1 3/6-1 2/6)×2⅖-0,1=1/6×12/5=0,4-0,1=0,3
i) (6,25-2 1/2):2 1/7-1=(5 5/4-2 2/4)÷2 1/7-1=3 3/4÷15/7-1=15/4×7/15-1=
7/4-1=3/4
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a) (3/4-1/5):1/2=(15/20-4/20):1/2=11/20:10/20=11/20*20/10=11/10=1 i 1/10=1.1
b) 3,2:(0,8-2/5)=32/10:(8/10-2/5)=32/10:(4/5-2/5)=16/5:2/5=16/5*5/2=8
c) 2/3*(1/2-1/6)=2/3*(3/6-1/6)=2/3*2/6=2/3*1/3=2/9
d)4,8+1/3*(1/2-0,6)=48/10+1/3*(5/10-6/10)=24/5+1/3*(-1/10)=24/5-1/30=4 i 1/5-1/30=4 i 6/30-1/30=4 i 5/30=4 i 1/6
e) (1-7/9)*(5,2-0,7)=2/9*(52/10-7/10)=2/9*45/10=10/10=1
f) 123:10+0,2*6,1=123/10+2/10*61/10=123/10+122/100=12.3+1.22=13.52
g) (6,5-4,7):(4-2 1/5)=1.8:(1 i 4/5)=18/10:9/5=9/5*5/9=1
h) (1,5-1 1/3)*2 2/5-0,1=(1 i 5/10-1 i 1/3)*12/5-0.1=(1 i 15/30-1 i 10/30)*12/5-0.1=5/30*12/5-0.1=12/30-1/10=12/30-10/30=2/30=1/30
i) (6,25-2 1/2):2 1/7-1=(6 i 25/100-2 i 1/2):15/7-1=(6 i 1/4-2 i 1/2)*7/15-1=(5 i 5/4-2 i 2/4)*7/15-1=3 i 3/4*7/15-1=15/4*7/15-1=7/4-1=1 i 3/4-1=3/4