Question

 Tính hợp lý

1/7 + 5/11 : 7/13 + 6/11 : 7/13

Cảm ơn+'+++++++

Answer 1

\(\frac{1}{7}+\frac{5}{11}:\frac{7}{13}+\frac{6}{11}:\frac{7}{13}\)

= \(\frac{1}{7}+\left(\frac{5}{11}+\frac{6}{11}\right):\frac{7}{13}\)

=\(\frac{1}{7}+\frac{11}{11}:\frac{7}{13}\)

=\(\frac{1}{7}+1:\frac{7}{13}\)

= \(\frac{1}{7}+\frac{13}{7}\)

= \(\frac{14}{7}=2\)

k cho mk nha

Answer 2

 1/7 + 5/11 : 7/13 + 6/11 : 7/13 

= \(\frac{1}{7}+\left(\frac{5}{11}+\frac{6}{11}\right):\frac{7}{13}\)

= \(\frac{1}{7}+1x\frac{13}{7}\)

= \(\frac{14}{7}=2.\)

Answer 3

2 nha bn

Answer 4

Ta có: \(\frac{1}{7}+\frac{5}{11}:\frac{7}{13}+\frac{6}{11}:\frac{7}{13}\)

\(=\frac{1}{7}+\frac{13}{7}\left(\frac{5}{11}+\frac{6}{11}\right)\\ =\frac{1}{7}+\frac{13}{7}\\ =2\)

Answer 5

\(\frac{1}{7}+\frac{5}{11}:\frac{7}{13}+\frac{6}{11}:\frac{7}{13}\)

\(=\frac{1}{7}+\frac{5}{11}x\frac{13}{7}+\frac{6}{11}x\frac{13}{7}\)

\(=\frac{1}{7}+\left(\frac{5}{11}x\frac{13}{7}+\frac{6}{11}x\frac{13}{7}\right)\)

\(=\frac{1}{7}+\left(\frac{5}{11}+\frac{6}{11}\right)x\frac{13}{7}\)

\(=\frac{1}{7}+1x\frac{13}{7}\)

\(=\frac{1}{7}+\frac{13}{7}\)

\(=\frac{14}{7}=2\)

Answer 6

   \(\frac{1}{7}+\frac{5}{11}:\frac{7}{13}+\frac{6}{11}:\frac{7}{13}\)

\(=\frac{1}{7}+\left(\frac{5}{11}+\frac{6}{11}\right):\frac{7}{13}\)

\(=\frac{1}{7}+1:\frac{7}{13}\)

\(=\frac{1}{7}+\frac{13}{7}\)

\(=\frac{14}{7}=2\)

Answer 7

\(\frac{1}{7}+\frac{5}{11}:\frac{7}{13}+\frac{6}{11}:\frac{7}{13}\)

\(=\frac{1}{7}+\left(\frac{5}{11}+\frac{6}{11}\right):\frac{7}{13}\)

\(=\frac{1}{7}+1:\frac{7}{13}\)

\(=\frac{14}{7}\)

\(=\frac{1}{7}+\frac{13}{7}\)

\(=2\)