tinh gia tri cua bieu thuc
7/5-6/5:3
tim y
y*6/7=3/4+2
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\(90872:296=307\)
\(6-\frac{3}{7}\)X \(\frac{14}{9}=\frac{124}{23}\)
\(\frac{3}{4}\)X \(\frac{4}{7}=\frac{3}{7}\)X \(\frac{3}{4}+\frac{3}{4}=\frac{9}{28}+\frac{3}{4}=\frac{15}{14}\)
\(\frac{7}{11}:\frac{3}{5}+\frac{4}{11}x\frac{5}{6}\)
=\(\frac{7}{11}x\frac{5}{3}+\frac{20}{66}\)
=\(\frac{35}{33}+\frac{10}{33}\)
=\(\frac{45}{33}\)
=\(\frac{15}{11}\)
= 7/11 x 5/3 + 4/11 x 5/6
= 35/33 + 10/33
=15/11
CHÚC BẠN HỌC TỐT
\(a,\text{ }\frac{1}{2}+\frac{1}{3}\text{ : }\frac{1}{6}\)
\(=\frac{1}{2}+\frac{1}{3}\cdot\frac{6}{1}\)
\(=\frac{1}{2}+\frac{6}{3}\)
\(=\frac{1}{2}+2\)
\(=\frac{1}{2}+\frac{4}{2}\)
\(=\frac{5}{2}\)
\(b,\text{ }\frac{1}{2}+\frac{1}{3}\cdot\frac{1}{4}\)
\(=\frac{1}{2}+\frac{1}{12}\)
\(=\frac{6}{12}+\frac{1}{12}\)
\(=\frac{7}{12}\)
\(\text{Dấu }\cdot\text{ là dấu nhân nha bạn !}\)
từ giả thiết 2b-3c=1 => c<b
và 2a+2b+3c=4033 => a+b+c=4033/2-c/2>=4033/2 vì c>=0
Max P=a+b+c = 4033/2 khi c=0
\(4+\frac{11}{8}-\frac{5}{6}=\frac{96+33-20}{24}=\frac{109}{24}\)
\(\left(\frac{1}{2}+\frac{4}{7}\right)-\left(\frac{3}{7}-\frac{3}{10}\right)=\frac{1}{2}+\frac{4}{7}-\frac{3}{7}+\frac{3}{10}\)
\(\left(\frac{1}{2}+\frac{3}{10}\right)+\left(\frac{4}{7}-\frac{3}{7}\right)=\frac{4}{5}+\frac{1}{7}=\frac{28+5}{35}=\frac{33}{35}\)
ban Chitanda Eru oi to bao nhung ma nhan voi bao nhieu ma ra duoc 96
C1: \(A=\left(\frac{36}{6}-\frac{4}{6}+\frac{3}{6}\right)-\left(\frac{150}{30}+\frac{50}{30}-\frac{45}{30}\right)-\left(\frac{18}{6}-\frac{14}{6}+\frac{15}{6}\right)\)
\(=\frac{35}{6}-\frac{155}{30}-\frac{19}{6}=\frac{35}{6}-\frac{31}{6}-\frac{19}{6}=-\frac{15}{6}=-2\frac{1}{2}\)
C2: \(6-\frac{2}{3}+\frac{1}{2}-5-\frac{5}{3}+\frac{3}{2}-3+\frac{7}{3}-\frac{5}{2}\)
\(=\left(6-5-3\right)-\left(\frac{2}{3}+\frac{5}{3}-\frac{7}{3}\right)+\left(\frac{1}{2}+\frac{3}{2}-\frac{5}{2}\right)\)
\(=-2-0-\frac{1}{2}=-2\frac{1}{2}\)
7/5 -6/5:3=7/5-2/5=1
yx6/7 = 3/4+2
y x 6/7 =11/4
y = 11/4:6/7
y =77/24
Bài 1:
7/5 - 6/5 : 3
= 7/5 - 2/5
= 5/5 = 1.
Bài 2:
y x 6/7 = 3/4 + 2
y x 6/7 = 15/4
y = 15/4 : 6/7
y = 35/8.
K mình nha!