tính nhanh 23/14 x 6/13 – 9/14 x 6/13 7/4 nhân 11/21 + 11 phần 21 nhân 5 phần 4 6 phần 7 nhân 16 phần 15 x 7/6 x 21/32 27/11/2021 Bởi Eloise tính nhanh 23/14 x 6/13 – 9/14 x 6/13 7/4 nhân 11/21 + 11 phần 21 nhân 5 phần 4 6 phần 7 nhân 16 phần 15 x 7/6 x 21/32
$\frac{23}{14}$ × $\frac{6}{13}$ -$\frac{9}{14}$ × $\frac{6}{13}$ = $\frac{6}{13}$ × ( $\frac{23}{14}$ – $\frac{9}{14}$ ) = $\frac{6}{13}$ × 1 = $\frac{6}{13}$ $\frac{7}{4}$ × $\frac{11}{21}$ + $\frac{11}{21}$ ×$\frac{5}{4}$ = $\frac{11}{21}$ × ( $\frac{7}{4}$ + $\frac{5}{4}$ ) = $\frac{11}{21}$ ×3 =$\frac{11}{7}$ $\frac{6}{7}$ × $\frac{16}{15}$ × $\frac{7}{6}$ ×$\frac{21}{32}$ = ($\frac{6}{7}$ ×$\frac{7}{6}$ ) × ( $\frac{16}{15}$ × $\frac{21}{32}$ ) = 1 × $\frac{7}{10}$ = $\frac{7}{10}$ Cho mk ctlhn nha ! <3 Bình luận
$\frac{23}{14}$ × $\frac{6}{13}$ -$\frac{9}{14}$ × $\frac{6}{13}$
= $\frac{6}{13}$ × ( $\frac{23}{14}$ – $\frac{9}{14}$ )
= $\frac{6}{13}$ × 1
= $\frac{6}{13}$
$\frac{7}{4}$ × $\frac{11}{21}$ + $\frac{11}{21}$ ×$\frac{5}{4}$
= $\frac{11}{21}$ × ( $\frac{7}{4}$ + $\frac{5}{4}$ )
= $\frac{11}{21}$ ×3
=$\frac{11}{7}$
$\frac{6}{7}$ × $\frac{16}{15}$ × $\frac{7}{6}$ ×$\frac{21}{32}$
= ($\frac{6}{7}$ ×$\frac{7}{6}$ ) × ( $\frac{16}{15}$ × $\frac{21}{32}$ )
= 1 × $\frac{7}{10}$
= $\frac{7}{10}$
Cho mk ctlhn nha ! <3
Đáp án:23/14 x6/13 -9/14 x6/13
=6/13 x(23/14 -9/14)=6/13 x1=2/13