Question

tính bằng cách thuận tiện nhất:

\(\frac{8}{15}\):\(\frac{2}{11}\)+\(\frac{7}{15}\):\(\frac{2}{11}\)

trả lời xong nhớ kết bạn với mik ^-^

Answer 1

\(\frac{8}{15}:\frac{2}{11}+\frac{7}{15}:\frac{2}{11}\)

\(=\left(\frac{8}{15}+\frac{7}{15}\right):\frac{2}{11}\)

\(=1:\frac{2}{11}\)

\(=\frac{11}{2}\)

Answer 2

   8/15 : 2/11 + 7/15 : 2/11

= (8/15 + 7/15) : 2/11

=       15/15      : 2/11

=          15/15  x  11/2

=                  165/30

Answer 3

\(\frac{8}{15}:\frac{2}{11}+\frac{7}{15}:\frac{2}{11}\)

\(=\left(\frac{8}{15}+\frac{7}{15}\right):\frac{2}{11}\)

\(=1:\frac{2}{11}\)

\(=\frac{11}{2}\)

Answer 4

44/15+77/30=...

Answer 5

8/15:2/11+7/15:2/11

=(8/15+7/15):2/11

=1:2/11

=11/2

Answer 6

\(\frac{8}{15}:\frac{2}{11}+\frac{7}{15}:\frac{2}{11}\)

\(=\frac{8}{15}\times\frac{11}{2}+\frac{7}{15}\times\frac{11}{2}\)

\(=\left(\frac{8}{15}+\frac{7}{15}\right)\times\frac{11}{2}\)

\(=1\times\frac{11}{2}\)

\(=\frac{11}{2}\)

Study well ! >_<

Answer 7

Tụi mày rút gọn tao ko rút gọn OK

Answer 8

   8/15 : 2/11+7/15 :2/11

= (8/15+7/15):2/11

=        15/15 : 2/ 11

=         1: 2/11

=          1 x 11/2

=             11/2

Answer 9

\(\frac{8}{15}\): \(\frac{2}{11}\)+ \(\frac{7}{15}\): \(\frac{2}{11}\)=

= \(\frac{8}{15}\)x \(\frac{11}{2}\)+ \(\frac{7}{15}\) x \(\frac{11}{2}\)

= \(\frac{11}{2}\)x ( \(\frac{8}{15}\)+ \(\frac{7}{15}\))

= \(\frac{11}{2}\)x 1

=\(\frac{11}{2}\)