1.tính
4/9+7/3 =……………………….. 36/7-12/5=……………………… 24/17×34/9=……………………..
=……………………….. =……………………… ……………………..
15/12+4=……………………….. 29/12-9/4=……………………… 45/16×64/36=……………………
……………………….. ……………………… …………………….
Nhanh nhé mik đang gấp
1.tính 4/9+7/3 =……………………….. 36/7-12/5=……………………… 24/17×34/9=……………………..
By Amaya
Đáp án:
4/9+7/3 =25/9
36/7-12/5=96/35
24/17×34/9=16/3
15/12+4=21/4
29/12-9/4=1/6
45/16×64/36=5
$#lam$
Giải thích các bước giải:
$\dfrac{4}{9}+$ $\dfrac{7}{3}=$ $\dfrac{4}{9}+$ $\dfrac{21}{9}=$ $\dfrac{25}{9}$
$\dfrac{36}{7}-$ $\dfrac{12}{5}=$ $\dfrac{180}{35}-$ $\dfrac{84}{35}=$ $\dfrac{96}{35}$
$\dfrac{24}{17}$ x $\dfrac{34}{9}=$ $\dfrac{16}{3}$
$\dfrac{15}{12}+4=$ $\dfrac{15}{12}+$ $\dfrac{48}{12}=$ $\dfrac{63}{12}=$ $\dfrac{21}{4}$
$\dfrac{29}{12}-$ $\dfrac{9}{4}=$ $\dfrac{29}{12}-$ $\dfrac{27}{12}=$ $\dfrac{2}{12}=$ $\dfrac{1}{6}$
$\dfrac{45}{16}$ x$\dfrac{64}{36}=$ $\dfrac{2880}{576}=5$
~Xin hay nhất~