Question

Rút gọn phân số 

a) 12×13 / 5×24

b) 25×17+25×12 / 29×13+29×14

Answer 1

a) \(\frac{12\cdot13}{5\cdot24}=\frac{13}{5\cdot2}=\frac{13}{10}\)

b)\(\frac{25\cdot17+25\cdot12}{29\cdot13+29\cdot14}=\frac{25\cdot\left(17+12\right)}{29\left(13+14\right)}=\frac{25\cdot29}{29\cdot27}=\frac{25}{27}\)

Answer 2

a, \(\frac{12.13}{5.24}=\frac{12.13}{5.2.12}=\frac{13}{10}\)

b, \(\frac{25.17+25.12}{29.13+29.14}=\frac{25.\left(17+12\right)}{29.\left(13+14\right)}=\frac{25.29}{29.27}=\frac{25}{27}\)

Answer 3

a, \(\frac{12.13}{5.24}=\frac{12.13}{5.12.2}=\frac{13}{5.2}=\frac{13}{10}\)

b, \(\frac{25.17+25.12}{29.13+29.14}=\frac{25\left(17+12\right)}{29\left(13+14\right)}=\frac{25.29}{29.27}=\frac{25}{27}\)

Answer 4

\(a,\frac{12.13}{5.24}=\frac{12.13}{5.12.2}=\frac{13}{5.2}=\frac{12}{10}\)

\(b,\frac{25.17+25.12}{19.13+29.14}=\frac{15.\left(17+12\right)}{29.\left(13+14\right)}=\frac{25.29}{29.27}=\frac{25}{27}\)

Answer 5

Trả lời:

\(a)\)\(\frac{12.13}{5.24}=\frac{12.13}{5.12.2}=\frac{13}{10}\)

\(b)\)\(\frac{25.17+25.12}{29.13+29.14}=\frac{25.\left(17+12\right)}{29.\left(13+14\right)}=\frac{25.29}{29.27}=\frac{25}{27}\)

Matcha