( 5/7 x 0,6 – 5 : 7/2 ) x ( 40% – 1,4 ) x -8 08/08/2021 Bởi Clara ( 5/7 x 0,6 – 5 : 7/2 ) x ( 40% – 1,4 ) x -8
( `5/7` x 0,6 – 5 : `7/2` ) x ( 40% – 1,4 ) x -8 = ( `5/7` x `3/5` – 5 x `2/7` ) x ( `2/5` – `7/5` ) x ( – 8 ) = ( `3/7` – `10/7` ) x ( -1 ) x ( – 8 ) = ( – 1 ) x ( – 1 ) x ( – 8 ) = – 8 Bình luận
Đáp án+Giải thích các bước giải: ↓↓↓ $(\frac{5}{7}.0,6-5:\frac{7}{2}).(40$%$-1,4).(-8)$ $=(\frac{5}{7}.\frac{3}{5}-5.\frac{2}{7}).(\frac{2}{5}.\frac{7}{5}).(-8)$ $=(\frac{3}{7}- \frac{10}{7}).(-1).(-8)$ $=(-1).(-1).(-8)$ $=(-8)$ Bình luận
( `5/7` x 0,6 – 5 : `7/2` ) x ( 40% – 1,4 ) x -8
= ( `5/7` x `3/5` – 5 x `2/7` ) x ( `2/5` – `7/5` ) x ( – 8 )
= ( `3/7` – `10/7` ) x ( -1 ) x ( – 8 )
= ( – 1 ) x ( – 1 ) x ( – 8 )
= – 8
Đáp án+Giải thích các bước giải:
↓↓↓
$(\frac{5}{7}.0,6-5:\frac{7}{2}).(40$%$-1,4).(-8)$
$=(\frac{5}{7}.\frac{3}{5}-5.\frac{2}{7}).(\frac{2}{5}.\frac{7}{5}).(-8)$
$=(\frac{3}{7}- \frac{10}{7}).(-1).(-8)$
$=(-1).(-1).(-8)$
$=(-8)$