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\(a,\frac{57}{300}=\frac{19}{100}=19\%\)
\(b,\frac{24}{400}=\frac{6}{100}=6\%\)
\(c,\frac{12}{500}=\frac{2.4}{100}=2,4\%\)
\(d,\frac{750}{600}=\frac{125}{100}=125\%\)
~Study well~
#๖ۣۜNamiko#
GIẢI
a) \(\frac{57}{300}=\frac{19}{100}=19\%\)
b) \(\frac{24}{400}=\frac{6}{100}=6\%\)
c)\(\frac{12}{500}=\frac{6}{250}=2,4\%\)
d )\(\frac{750}{600}=\frac{125}{100}=125\%\)
P/S: HOK TỐT !
a)\(\frac{5}{6}=\frac{1}{2}+\frac{1}{3}\)
b)\(\frac{7}{12}=\frac{1}{2}+\frac{1}{12}=\frac{1}{3}+\frac{1}{4}\)
c)\(\frac{7}{8}=\frac{1}{8}+\frac{6}{8}\)
\(\frac{5}{6}=\frac{1}{2}+\frac{1}{3}\)
\(\frac{7}{12}=\frac{1}{3}+\frac{1}{4}\)
\(x\times\frac{3}{5}+x\times\frac{2}{7}=\frac{31}{70}\)
\(x\times\left(\frac{3}{5}+\frac{2}{7}\right)=\frac{31}{70}\)
\(x\times\frac{31}{35}=\frac{31}{70}\)
\(x=\frac{31}{70}:\frac{31}{35}\)
\(x=\frac{1}{2}\)
1/2 BAN NHA
TA LẤY X*(3/5+2/7)=31/70
X*31/35=31/70
X=31/70:31/35
X=1/2
\(=\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+...+\frac{1}{10}\)có 9 p/số
\(=\frac{1}{10}.9=\frac{9}{10}\)
21/70=3/10
60/75=80/100
14/35=40/100
107/125=856/1000
75/300=25/100
46/500=92/1000
\(=\frac{1}{10}+\)\(\frac{1}{10}+\)\(\frac{1}{10}+\)\(\frac{1}{10}+\)\(\frac{1}{10}+\)\(\frac{1}{10}+\)\(\frac{1}{10}+\)\(\frac{1}{10}+\)\(\frac{1}{10}\)
\(=\frac{1}{10}.9\)
\(=\frac{9}{10}\)
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\(\frac{1}{10}+\frac{2}{20}+\frac{3}{30}+\frac{4}{40}+\frac{5}{50}+\frac{6}{60}+\frac{7}{70}+\frac{8}{80}+\frac{9}{90}\)
\(=\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}\)
\(=\frac{1}{10}\times9\)
\(=\frac{9}{10}\)
TL :
a) 8,2
b) 36,23
c) 54,07
d) 12,254
Chúc bn hok tốt ~
chọn đáp án B
\(B.\frac{7}{1}\)Và\(D.\frac{700}{100}\)
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