\(\frac{458.75-374}{72.458+1000}\)
\(\frac{458.75-374}{72.458-1000}\)
\(\frac{458.75-374}{72.458+1000}\)
các bạn giải giúp mik bài: 458x75-374 phần 72x458+1000
sai đề nha 75 sao trừ được 375
các bạn giải giúp mik bài : 458x75-374 phần 72x458+1000 nhé
\(\frac{34}{43}=\frac{374}{x-32}\)
\(\frac{34}{43}=\frac{374}{x-32}\)
\(\Rightarrow34\left(x-32\right)=43x374\)
\(\Rightarrow34x-1088=16082\)
\(\Rightarrow34x=16082+1088=17170\)
\(\Rightarrow x=\frac{17170}{34}=505\)
34/43=374/x-32
43.374=34(x-32)
16082=34x-1088
34x=16082-1088
34x=17170
x=505
\(\frac{1}{1000}+\frac{13}{1000}+\frac{25}{1000}+\frac{37}{1000}+\frac{49}{1000}+.......+\frac{87}{1000}+\frac{99}{1000}\)
ai giải được mink tick nhớ đầy đủ chi tiết nhé
cai bai nay minh thay
quen quen nhung lai ko nghi ra
chu!
chuc bn hoc gioi1
Ta có : \(\frac{1}{1000}+\frac{13}{1000}+\frac{25}{1000}+.....+\frac{85}{1000}+\frac{97}{1000}\)
\(=\frac{1+13+25+......+85+97}{1000}\)
\(=\frac{441}{1000}\)
\(\frac{1}{1000}+\frac{13}{1000}+\frac{25}{1000}+.....+\frac{97}{1000}+\frac{109}{1000}\)
\(\frac{1}{1000}+\frac{13}{1000}+\frac{25}{1000}+...+\frac{97}{1000}+\frac{109}{1000}\)
\(=\frac{1+13+25+...+97+109\left(9số\right)}{1000}\)
\(=\frac{\left(109+1\right).9:2}{1000}=\frac{495}{1000}=\frac{99}{200}\)
Bằn 11/20 nhé chúc bạn học tốt
\(\frac{1}{1000}+\frac{13}{1000}+\frac{25}{1000}+...+\frac{97}{1000}+\frac{109}{1000}\)
\(=\frac{\left(1+13+25+...+97+109\right)}{1000}\)
\(=\frac{\left(109+1\right)\times\left[\left(109-1\right):12+1\right]:2}{1000}\)
\(=\frac{110\times10:2}{100}\)
\(=\frac{550}{100}\)
\(=5\frac{1}{2}\)
\(\frac{13.4^6.\left(28\frac{7}{13}-27\frac{5}{18}\right)}{59.212.\left(\frac{5}{14}+\frac{5}{84}+\frac{5}{204}+\frac{5}{374}\right)}\)
$\frac{999}{1000}+\frac{998}{1000}+\frac{997}{1000}+...+\frac{1}{1000}$