\(\frac{11}{2}\)
k mk bạn nhá!! Thanks
cách 1:
\(\frac{8}{15}:\frac{2}{11}+\frac{7}{15}:\frac{2}{11}=\frac{8}{15}.\frac{11}{2}+\frac{7}{15}.\frac{11}{2}=\frac{11}{2}\left(\frac{8}{15}+\frac{7}{15}\right)=\frac{11}{2}.1=\frac{11}{2}\)
cách 2:
\(\frac{8}{15}:\frac{2}{11}+\frac{7}{15}:\frac{2}{11}=\frac{44}{15}+\frac{77}{30}=\frac{11}{2}\)
cach 1 ban lay
8/15:2/11 + 7/15 ; 2/ 11 = 88/30+77/30
= 165/30 = 11
cach2 :
8/15;2/11 + 7/15:2/11 = ( 8/15 + 7/15 ) : 2/11
= 15/15 : 2/11
= 165/30=11
c1:tính như bình thường
=44/15 + 77/30
=11/12
c2:đặt 2/11
=(8/15 + 7/15 ):2/11
=1 : 2/11
=11/2
Chúc bạn làm bài thành công !
c1:8/15 : 2/11 + 7/15 : 2/11
=(8/15:2/11)+(7/15:2/11)
=44/15 + 77/30
=5,5
c2:8/15:2/11+7/15:2/11
(8/15+7/15):2/11
=1:2/11
=5,5 tk đúng cho mk nhé
C1: 8/15 : 2/11 + 7/15 : 2/11
= ( 8/15 + 7/15 ) : 2/11
=11/2
C2: 8/15 : 2/11 + 7/15 : 2/11
= 44/15 + 77/30
= 165/30
Cách2 :8/15:2/11+7/15:2/11
=2/11:(8/15+7/15)
=2/11:1
=2/11
c1
8/15 :2/11 + 2/11 : 7/11 =88/30 + 77/30 =165/30 =2/11
c2
8/15: 2/11 + 2/11 : 7/15 = (8/15 + 7/15) :2/11=2/11
Các bạn ơi có đúng ko vậy
