7/22:3/11+7/22:4/11
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\(\frac{7}{22}:\frac{3}{11}+\frac{7}{22}:\frac{4}{11}\)
\(=\frac{7}{22}:\left(\frac{3}{11}+\frac{4}{11}\right)\)
\(=\frac{7}{22}:\frac{7}{11}\)
\(=\frac{1}{2}\)
ti ck nha
\(\frac{7}{22}\) : (\(\frac{3}{11}\) + \(\frac{4}{11}\) )
\(\frac{7}{22}\) : \(\frac{7}{11}\) =\(\frac{7}{22}\) x \(\frac{11}{7}\) = 2
a) \(\frac{7}{11}-\left(\frac{3}{5}+\frac{7}{11}\right)=-\frac{3}{5}\)
b) \(\left(\frac{11}{22}+\frac{5}{11}\right)-\frac{19}{22}=\frac{1}{11}\)
c) \(\frac{2}{9}.\frac{4}{5}+\frac{2}{9}.\frac{14}{5}=\frac{4}{5}\)
d) \(-\frac{3}{2}.\frac{7}{10}-\frac{3}{2}.\frac{1}{10}=-\frac{6}{5}\)
e) \(\left(0,75-1+\frac{1}{4}\right):\left(\frac{1515}{1616}+\frac{1616}{1717}\right)=0\)
BÀI 1
a, \(5\times\frac{-7}{10}=\frac{-35}{10}=\frac{-7}{2}\)
b, \(\frac{4}{5}\times\frac{-7}{10}=\frac{-28}{50}=\frac{-14}{25}\)
c, \(\frac{4}{9}+\frac{4}{3}\times\frac{16}{4}=\frac{4}{9}+\frac{16}{3}=\frac{52}{9}\)
d, \(\frac{11}{22}-\frac{3}{9}\times\frac{14}{21}=\frac{11}{22}-\frac{2}{9}=\frac{55}{198}=\frac{5}{18}\)
BÀI 2
\(A=\frac{6}{13}\times\frac{5}{7}+\frac{6}{13}\times\frac{2}{7}+\frac{17}{13}\)
\(A=\frac{30}{91}+\frac{12}{91}+\frac{17}{13}\)
\(A=\frac{30}{91}+\frac{12}{91}+\frac{119}{91}\)
\(A=\frac{161}{91}=\frac{23}{13}\)
\(B=\frac{11}{15}\times\frac{4}{11}+\frac{11}{15}\times\frac{5}{11}+\frac{11}{15}\times\frac{2}{11}\)
\(B=\frac{4}{15}+\frac{1}{3}+\frac{2}{15}\)
\(B=\frac{11}{15}\)
\(C=\left(\frac{19}{64}-\frac{33}{22}+\frac{24}{51}\right)\times\left(\frac{1}{5}-\frac{1}{15}-\frac{2}{15}\right)\)
\(C=\frac{-797}{1088}\times0\)
\(C=0\)
\(D=\frac{8}{13}\times\frac{7}{12}+\frac{8}{13}\times\frac{5}{12}-\frac{1}{12}\)
\(D=\frac{14}{39}+\frac{10}{39}-\frac{1}{12}\)
\(D=\frac{83}{156}\)
bạn biết câu náy không (24 + 11) . {546 - [14 . (64 - 2^{3}3) : 2]} =
a, 7/12 - 3/4 . 5/6
= 7/12 - 5/8
= 14/24- 15/24
= -1/24
b,( 2/1/3 + 1/3/4 ) . 12/13
= ( 6/3 + 7/3 ) . 12/13
= 13/3 . 12/13
=4
c, 12 : ( 3/4 -5/6 ) . 2
= 12 : ( -1/12 ) .2
= 12 . -12 . 2
= -228
d, 7/22 : 3/11 + 7/22 : 4/11
= 7/22 . 11/3 + 7/22 . 11/4
= 7/22 . ( 11/3 + 11/4 )
....
tiếp theo bạn tự làm nhé!
3/8
13
Đặt tử ra ngoài rồi nhóm các phân số có mẫu lần lượt là 7,5,11,37 và tử là 1 vào xong rút gọn đi là ok = 3/4
\(\left(\frac{3}{4}+\frac{-7}{2}\right).\left(\frac{2}{11}+\frac{12}{22}\right)=\frac{-11}{4}.\frac{8}{11}=-2\)
\(\left(-\dfrac{5}{11}+\dfrac{7}{22}--\dfrac{4}{33}-\dfrac{5}{44}\right):\left(38\dfrac{1}{22}-39\dfrac{7}{22}\right)\)
\(=\left(-\dfrac{60}{132}+\dfrac{42}{132}+\dfrac{16}{132}-\dfrac{15}{132}\right):\left(\dfrac{837}{22}-\dfrac{865}{22}\right)\)
\(=-\dfrac{17}{132}\cdot\left(-\dfrac{14}{11}\right)\)
\(=\dfrac{119}{726}\)
#AvoidMe
\(=\left(\dfrac{-60}{132}+\dfrac{42}{132}+\dfrac{16}{132}-\dfrac{15}{432}\right):\left(-1-\dfrac{3}{11}\right)\)
\(=\dfrac{-17}{132}\cdot\dfrac{-11}{14}=\dfrac{17}{168}\)
\(\dfrac{7}{22}:\dfrac{3}{11}+\dfrac{7}{22}:\dfrac{4}{11}=\dfrac{7}{22}.\dfrac{11}{3}+\dfrac{7}{22}.\dfrac{11}{4}=\dfrac{7}{22}\left(\dfrac{11}{3}+\dfrac{11}{4}\right)=\dfrac{7}{22}.\dfrac{77}{12}=\dfrac{49}{24}\)
7/11 chứ nhỉ ?