Bài 1; a,7/8-(1/4+2/5) b,5/11-(3/5-6/11) 03/10/2021 Bởi Daisy Bài 1; a,7/8-(1/4+2/5) b,5/11-(3/5-6/11)
a, $\frac{7}{8}$ – ( $\frac{1}{4}$ + $\frac{2}{5}$ )= $\frac{7}{8}$ – $\frac{13}{20}$ = $\frac{9}{40}$ b, $\frac{5}{11}$ – ( $\frac{3}{5}$ – $\frac{6}{11}$ )= $\frac{5}{11}$ – $\frac{3}{55}$ = $\frac{2}{5}$ Bình luận
Đáp án: a/ $\dfrac9{40}$ b/ $\dfrac25$ Giải thích các bước giải: a/ $\dfrac78-\left(\dfrac14+\dfrac25\right)$ $=\dfrac78-\dfrac{13}{20}$ $=\dfrac9{40}$ b/ $\dfrac5{11}-\left(\dfrac35-\dfrac6{11}\right)$ $=\dfrac5{11}-\dfrac3{55}$ $=\dfrac25$ Bình luận
a, $\frac{7}{8}$ – ( $\frac{1}{4}$ + $\frac{2}{5}$ )
= $\frac{7}{8}$ – $\frac{13}{20}$
= $\frac{9}{40}$
b, $\frac{5}{11}$ – ( $\frac{3}{5}$ – $\frac{6}{11}$ )
= $\frac{5}{11}$ – $\frac{3}{55}$
= $\frac{2}{5}$
Đáp án:
a/ $\dfrac9{40}$
b/ $\dfrac25$
Giải thích các bước giải:
a/
$\dfrac78-\left(\dfrac14+\dfrac25\right)$
$=\dfrac78-\dfrac{13}{20}$
$=\dfrac9{40}$
b/
$\dfrac5{11}-\left(\dfrac35-\dfrac6{11}\right)$
$=\dfrac5{11}-\dfrac3{55}$
$=\dfrac25$