Tính 3/4 + 4/10 4/3 – 2/7 4 – 5/12 × 3/10 3/5 + 1/2 : ( 6 × 2/9 ) 18/09/2021 Bởi Cora Tính 3/4 + 4/10 4/3 – 2/7 4 – 5/12 × 3/10 3/5 + 1/2 : ( 6 × 2/9 )
$\frac{3}{4}$+$\frac{4}{10}$ = $\frac{15}{20}$+$\frac{8}{20}$ = $\frac{23}{20}$ $\frac{4}{3}$- $\frac{2}{7}$ = $\frac{28}{21}$- $\frac{6}{21}$ = $\frac{22}{21}$ 4-$\frac{5}{12}$x$\frac{3}{10}$ = 4-$\frac{1}{8}$ = $\frac{32}{8}$- $\frac{1}{8}$ = $\frac{31}{8}$ $\frac{3}{5}$+$\frac{1}{2}$:(6x$\frac{2}{9}$) = $\frac{3}{5}$+$\frac{1}{2}$:$\frac{4}{3}$ = $\frac{3}{5}$+$\frac{1}{2}$x$\frac{3}{4}$ = $\frac{3}{5}$+$\frac{3}{8}$ = $\frac{24}{40}$+$\frac{15}{40}$ = $\frac{39}{40}$ xin hay nhất ạ Bình luận
$\frac{3}{4}$+$\frac{4}{10}$ = $\frac{15}{20}$+$\frac{8}{20}$ = $\frac{23}{20}$
$\frac{4}{3}$- $\frac{2}{7}$ = $\frac{28}{21}$- $\frac{6}{21}$ = $\frac{22}{21}$
4-$\frac{5}{12}$x$\frac{3}{10}$ = 4-$\frac{1}{8}$ = $\frac{32}{8}$- $\frac{1}{8}$ = $\frac{31}{8}$
$\frac{3}{5}$+$\frac{1}{2}$:(6x$\frac{2}{9}$) = $\frac{3}{5}$+$\frac{1}{2}$:$\frac{4}{3}$ = $\frac{3}{5}$+$\frac{1}{2}$x$\frac{3}{4}$ = $\frac{3}{5}$+$\frac{3}{8}$ = $\frac{24}{40}$+$\frac{15}{40}$ = $\frac{39}{40}$
xin hay nhất ạ
Đáp án:3/4+4/10=0,475
4/3-2/7=1.04
4-5/12×3/10=3,875
3/5+1/2:(6×2/9)=0,975