Question

A = 290 - 18 X 1 + 567 : 17

B = 1/7 x 3 va 1/11 - 1/7 x 9/11 -1/7

tim a va b

Answer 1

\(A=290-18\times1+567:17\)                      

\(A=290-18+\frac{567}{17}\)

\(A=272+\frac{567}{17}\)

\(A=\frac{4624}{17}+\frac{567}{17}\)

\(A=\frac{5191}{17}\).

\(B=\frac{1}{7}\times3\frac{1}{11}-\frac{1}{7}\times\frac{9}{11}-\frac{1}{7}\)

\(B=\frac{1}{7}\times\frac{34}{11}-\frac{1}{7}\times\frac{9}{11}-\frac{1}{7}\)

\(B=\left(\frac{34}{11}-\frac{9}{11}-1\right)\times\frac{1}{7}\)

\(B=\left(\frac{25}{11}-1\right)\times\frac{1}{7}\)

\(B=\frac{14}{11}\times\frac{1}{7}\)

\(B=\frac{87}{77}\)

Chúc bạn hok tốt !