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4/3 + 3/3 = 7/3
5/2 x 4 = 10
2 - 7/8 = 16/8 - 7/8 = 9/8
5 x 7/5 = 7
5/6 x 7/2= 35/12
4/3 + 3/3 = 7/3
5/2 x 4 = 10
2 - 7/8 = 16/8 - 7/8 = 9/8
5 x 7/5 = 7
5/6 x 7/2= 35/12
![](https://rs.olm.vn/images/avt/0.png?1311)
Tính:
\(\frac{4}{7}+\frac{3}{7}=\frac{4+3}{7}=\frac{7}{7}=1\)\(1\)
\(\frac{11}{9}-\frac{2}{9}=\frac{11-2}{9}=\frac{9}{9}=1\)
\(\frac{2}{6}+\frac{5}{6}-\frac{1}{6}=\frac{2+5-1}{6}=\frac{6}{6}=1\)
Học tốt!
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2/3 + 7/1 = 2/3 + 7 = 2/3 + 21/3 = 23/3
25/48 + 11/24 = 25/48 + 22/48 = 47/48
5/7 + 3/8 = 40/56 + 21/56 = 61/56
15/24 + 12/6 = 5/8 + 2 = 5/8 + 16/8 = 21/8
5/6 + 4/3 = 5/6 + 8/6 = 13/6
3/8 + 7/12 = 9/24 + 14/24 = 23/24
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1/5*2/7:1/7=1/5*2/7*7.
=(1*2*7)/(5*7*1).
=2/5.
tk mk nha các bn.
-chúc ai tk mk học giỏi nha-
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1-2+3-4+5-6+...+99-100+101
= (1+3+5+...+101) - (2+4+6+...+100)
tu 1 den 101 co : (101-1):2+1=51
1+..+101 = (1+101)x 51:2= 2601
tu 2 den 100 co : (100-2);2+1=50
2+...+100 = (100 +2) x 50:2=2550
=> A= 2601-2550=51
học tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{5}{6}+\frac{8}{4}=\frac{10}{12}+\frac{24}{12}=\frac{34}{12}=\frac{17}{6}\)
\(\frac{5}{6}+\frac{8}{4}=\frac{5}{6}+2=\frac{17}{6}\)
mink hết lượt kb rồi nhưng bạn ủng hộ mink nha, làm ơn bn
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[6: 3/5 - 7/6 x 6/7] : [ 21/5 x 10/11 + 57/11]
= 9 : 9
= 1
\(\left(6:\frac{3}{5}-\frac{7}{6}\times\frac{6}{7}\right):\left(\frac{21}{5}\times\frac{10}{11}+\frac{57}{11}\right)\)
\(=\left(10-1\right):\left(\frac{42}{11}+\frac{57}{11}\right)\)
\(=9:9\)
\(=1\)
TL:
\(\frac{6}{7}-\frac{2}{5}=\frac{30}{35}-\frac{14}{35}=\frac{16}{35}\)
HT
một bạn đầu tiên mink sẽ kkk cho