(-7)/25 ×11/3+(-7)/25 ×2/13-18/25 Tinh nhanh 29/10/2021 Bởi Nevaeh (-7)/25 ×11/3+(-7)/25 ×2/13-18/25 Tinh nhanh
$\frac{-7}{25}$ . $\frac{11}{13}$ + $\frac{-7}{25}$ . $\frac{2}{13}$ – $\frac{18}{25}$ = ( $\frac{-7}{25}$ . $\frac{11}{13}$ – $\frac{7}{25}$ . $\frac{2}{13}$ ) – $\frac{18}{25}$ = $\frac{-7}{25}$ . ($\frac{11}{13}$ + $\frac{2}{13}$ ) – $\frac{18}{25}$ = $\frac{-7}{25}$ . 1 – $\frac{18}{25}$ = $\frac{-7}{25}$ – $\frac{18}{25}$ = -1 Bình luận
Đáp án: Giải thích các bước giải: `(-7)/25 ×11/13+(-7)/25 ×2/13-18/25` `=-7/25(11/13+2/13)-18/25` `=-7/25.1-18/25=-25/25=-1` Bình luận
$\frac{-7}{25}$ . $\frac{11}{13}$ + $\frac{-7}{25}$ . $\frac{2}{13}$ – $\frac{18}{25}$
= ( $\frac{-7}{25}$ . $\frac{11}{13}$ – $\frac{7}{25}$ . $\frac{2}{13}$ ) – $\frac{18}{25}$
= $\frac{-7}{25}$ . ($\frac{11}{13}$ + $\frac{2}{13}$ ) – $\frac{18}{25}$
= $\frac{-7}{25}$ . 1 – $\frac{18}{25}$
= $\frac{-7}{25}$ – $\frac{18}{25}$
= -1
Đáp án:
Giải thích các bước giải:
`(-7)/25 ×11/13+(-7)/25 ×2/13-18/25`
`=-7/25(11/13+2/13)-18/25`
`=-7/25.1-18/25=-25/25=-1`