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\(a,3,47\times\dfrac{1}{2}-2,47:2+0,5=a,3,47\times\dfrac{1}{2}-2,47\times\dfrac{1}{2}+\dfrac{1}{2}=\dfrac{1}{2}\times\left(3,47-2,47+1\right)=\dfrac{1}{2}\times2=1\)
a)9,18:0,2+9,18:0,25+9,18
=9,18x(0,2+0,25+1)
=13,311
b)9,18:0,2-6,18-0,2
=(9,18-6,18):0,2
=15
c)2,4:0,125+2,4:0,25-2,4:0,5
=2,4:(0,125+0,25-0,5)
=24
kink cho minh nhe
Banj có thể giải thích giúp là tại sao
2,4÷0,125 + 2,4 ÷0,25 - 2,4 ÷ 0,5
2,4÷(0,125 + 0,25 - 0,5)
= 24
\(x\times\left(0,1+4+2,9+2+1\right)=25,2\)
\(10x=25,2\)
\(x=2,52\)
\(x\times0,1+x\times4+x\times2,9+x\times2+x=25,2\)
\(x\times\left(0,1+4+2,9+2+1\right)=25,2\)
\(x\times10=25,2\)
\(x=25,2:10\)
\(x=2,52\)
tìm x mè giải thích sao :v?
\(\dfrac{1}{10}+\dfrac{2}{10}+\dfrac{3}{10}+\dfrac{4}{10}+\dfrac{5}{10}+\dfrac{6}{10}+\dfrac{7}{10}+\dfrac{8}{10}+\dfrac{9}{10}\)
\(=\left(\dfrac{1}{10}+\dfrac{9}{10}\right)+\left(\dfrac{2}{10}+\dfrac{8}{10}\right)+\left(\dfrac{3}{10}+\dfrac{7}{10}\right)+\left(\dfrac{4}{10}+\dfrac{6}{10}\right)+\dfrac{5}{10}\)
\(=1+1+1+1+\dfrac{5}{10}\)
\(=4+\dfrac{5}{10}\)
\(=\dfrac{45}{10}\)
\(13,25:0,5+13,25:0,25+13,25:0,125+13,25\times6\)
\(=13,25:\dfrac{1}{2}+13,25:\dfrac{1}{4}+13,25:\dfrac{1}{8}+13,25\times6\)
\(=13,25\times2+13,25\times4+13,25\times8+13,25\times6\)
\(=13,25\times\left(2+4+8+6\right)\)
\(=13,25\times20\)
\(=265\)
13, 25 : 0. 125 + 13. 25 : 0. 25 - 13. 25 : 0. 5
= 13. 25 . 8 + 13. 25 . 4 - 13, 25 . 2
= 13, 25( 8 + 4 - 2 )
= 13, 25 . 10
= 132, 5
a) \(2,4:0,25+5,6:4+2\times\frac{1}{4}\)
\(=2,4\times\frac{1}{4}+5,6\times\frac{1}{4}+2\times\frac{1}{4}\)
\(=\left(2,4+5,6+2\right)\times\frac{1}{4}\)
\(=10\times\frac{1}{4}=\frac{5}{2}\)
b)\(3,47\times\frac{1}{2}-2,47:2+0,5\)
\(=3,47\times\frac{1}{2}-2,47\times\frac{1}{2}+\frac{1}{2}\times1\)
\(=\left(3,47-2,47+1\right)\times\frac{1}{2}\)
\(=2\times\frac{1}{2}=1\)
#Y/n