đăng ít câu hỏi thôi bạn

,không biết thì hỏi thôi bạn

\(\frac{43}{20}+\frac{17}{6}:\left(\frac{5}{8}+\frac{7}{30}\right)\)

\(=\frac{43}{20}+\frac{17}{6}:\left(\frac{103}{120}\right)\)

\(=\frac{43}{20}+\frac{17}{6}.\frac{120}{103}\)

\(=\frac{43}{20}+\frac{340}{103}=\frac{11229}{2060}\)

a) 43/20 + 17/6 : ( 150/240 + 210/240 )

=    43/20 + 17/6 :  360/240

=    43/20 + 17/6 : 3/2

=    43/20 + 34/18

=     774/360 + 612/360

=   1386/360

=  77/20

b)

=  ( 5/30 + 3/30 + 2/30 ) : ( 5/30 + 3/30 - 2/30 )

=  10/30   :    0

=  1/3   :   0

=1/3

Đó là cách giải chi tiết va dễ hiểu nhất đó     ^ - ^

; hay chia       

\(\frac{43}{20}+\frac{17}{6}:\left[\frac{5}{8}+\frac{7}{30}\right]\)

= \(\frac{43}{20}+\frac{17}{6}:\frac{103}{120}\)

= \(\frac{43}{20}+\frac{340}{103}\)

=\(\frac{11229}{2060}\).

\(\frac{43}{20}+\frac{17}{6}:\left[\frac{5}{8}+\frac{7}{30}\right]\)

\(=\frac{43}{20}+\frac{17}{6}:\left[\frac{103}{120}\right]\)

\(=\frac{43}{20}+\frac{340}{103}=\frac{11229}{2060}\)

\(\frac{43}{20}+\frac{17}{6}:\left(\frac{5}{8}+\frac{7}{30}\right)\)

\(=\frac{43}{20}+\frac{17}{6}:\frac{103}{120}\)

\(=\frac{43}{20}+\frac{340}{103}\)

\(=\frac{11229}{1060}\)

a,246:6+1502,5=41+1502=1543

b,43/20+17/6:(5/8+7/30)=43/20+17/6:103/120=43/20+340/103=11229/2060

a) 246 : 6 + 1502, 5

=    41     + 1502 , 5

=          1543, 5

a , 246 : 6  + 1502 , 5

= 41          + 1502,5

= 1543,5

\(=\frac{43}{20}+\frac{17}{65}:\frac{103}{120}\)

\(=\frac{43}{20}+\frac{408}{1339}\)

\(=2,454705004\)

tíc mình nha

\(\frac{43}{20}+\frac{17}{65}:\left(\frac{5}{8}+\frac{7}{30}\right)\)

\(=\frac{43}{20}+\frac{17}{65}:\frac{103}{120}\)

\(=\frac{43}{20}+\frac{408}{1339}\)

\(=2,4547........\)

\(\frac{43}{20}+\frac{17}{65}:\left(\frac{5}{8}+\frac{7}{30}\right)\)

\(=\frac{43}{20}+\frac{17}{65}:\frac{103}{120}\)

\(=\) \(\frac{43}{20}+\frac{408}{1339}\)

\(\frac{43}{20}+\frac{17}{6}:\left(\frac{5}{8}+\frac{7}{30}\right)\)

\(=\frac{43}{20}+\frac{17}{6}\cdot\frac{120}{103}\)

\(=\frac{43}{20}+\frac{340}{103}\)

\(=\frac{11229}{2060}\)

\(\frac{11229}{2060}\)

nhớ mình nhé

\(\frac{11229}{2060}\)

áp dụng kiến thức tính nhanh ý

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=1275

= 1275