Question

Tính :

a) 11 / 3  :  99 / 21  -  5 / 18

b) 4 / 5  +  16 / 5  :  4 / 55

c) 26 : 13 / 17  x  34 / 7

Answer 1

\(26:\frac{13}{17}.\frac{34}{7}\)

\(=26.\frac{17}{13}.\frac{34}{7}=2.17.\frac{34}{7}=34.\frac{34}{7}\)

\(=\frac{1156}{7}\)

Answer 2

11 / 3 . 21 / 91 - 5 / 18

= 11 / 13 - 5 / 18

= 133 / 234

Answer 3

= 4 / 5 + 16 / 5 . 55 / 4

= 4 / 5 + 44

= 224 / 5

Answer 4

\(a,\frac{11}{3}:\frac{99}{21}-\frac{5}{18}\)

\(=\frac{7}{9}-\frac{5}{18}\)

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

\(b,\frac{4}{5}+\frac{16}{5}:\frac{4}{55}\)

\(=\frac{4}{5}+44\)

\(=\frac{224}{5}\)

\(c,26:\frac{13}{17}×\) \(\frac{34}{7}\)

\(=34×\frac{34}{7}\)

\(=\frac{1156}{7}\)