35,8 + ( 3.14 + 5,86) x 6
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\(a.7,15:0,5+7,15.9-7,15=7,15.\left(2+1-1\right)\)
\(=7,15.10=71,5.\)
\(b.3,14:0,1+75\%.3,14+3,14:0,125+81,25.3,14=3,14.\left(10+\frac{3}{4}+8+81,25\right)\)
\(=3,14.100=314.\)
7.15*2+7.15*9-7.15
7.15*(2+9-1)
7.15*10
71.5
b, 3.14*10+7.5*3.14+3.14*8+81.25*3.14
=314*(10+7.5+8+81.25)
=3.14*106.75
=355.195
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x.3,14+x.5,86-x=2012
x.(3,14+5,86)-x=2012
x.9-x=2012
x.(9-1)=2012
x.8=2012
x=2012:8
x=251,5
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1) 7.48: (x-31,72) =13.6
x-31,72=7,48:13,6
x-31,72=0,55
x =0,55+31,72
x = 32,27
2) x+35.2= (25,6+3,14)x3
x+35,2=28,74x3
x+35,2=86,22
x= 86,22-35,2
x=54,02
Chúc bn hk tốt ! Nhớ k nha!
1)x-31.72=7.48:13.6=0.55
x=0.55+31.72=32.27
2)x+35.2=28.74x3=86.22
x=86.22-35.2=51.02
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35,8 + x x 4 = 100
x x 4 = 100- 35,8
x x 4 = 64,2
x= 64,2 : 2
x= 32,1
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=35,8+9x6=35,8+54=89,6
=35,8+9x6
=35,8+54
=89,8
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