Toán Đề bài: Thực hiện phép tính , -12/25 : 7/8 + -9/8 .12/25 – 1/25 04/10/2021 By Ivy Đề bài: Thực hiện phép tính , -12/25 : 7/8 + -9/8 .12/25 – 1/25
$\frac{-12}{25}$ : $\frac{7}{8}$ + $\frac{-9}{8}$ . $\frac{12}{25}$ – $\frac{1}{25}$ = $\frac{-12}{25}$ . $\frac{8}{7}$ + $\frac{9}{8}$ . $\frac{-12}{25}$ – $\frac{1}{25}$ = $\frac{-12}{25}$ . ( $\frac{8}{7}$ + $\frac{9}{8}$ ) – $\frac{1}{25}$ = $\frac{-12}{25}$ . ( $\frac{64}{56}$ + $\frac{63}{56}$ ) – $\frac{1}{25}$ = $\frac{12}{25}$ . $\frac{127}{56}$ – $\frac{1}{25}$ = $\frac{254}{575}$ – $\frac{1}{25}$ = $\frac{254}{575}$ – $\frac{23}{575}$ = $\frac{231}{575}$ HỌC TỐT NHA ! #NOCOPY Mình nghĩ bạn ghi sai đề á Trả lời
$\text { Đáp án: }$ ` –12/25 : 7/8 + (–9/8) . 12/25 – 1/25 ` ` = –12/25 . 8/7 + 9/8 . (–12/25) – 1/25 ` ` = –12/25 . ( 9/8 + 8/7 ) – 1/25 ` ` = –12/25 . 127/56 – 1/25 ` ` = 254/575 – 1/25 ` ` = 231/575 ` Trả lời
$\frac{-12}{25}$ : $\frac{7}{8}$ + $\frac{-9}{8}$ . $\frac{12}{25}$ – $\frac{1}{25}$
= $\frac{-12}{25}$ . $\frac{8}{7}$ + $\frac{9}{8}$ . $\frac{-12}{25}$ – $\frac{1}{25}$
= $\frac{-12}{25}$ . ( $\frac{8}{7}$ + $\frac{9}{8}$ ) – $\frac{1}{25}$
= $\frac{-12}{25}$ . ( $\frac{64}{56}$ + $\frac{63}{56}$ ) – $\frac{1}{25}$
= $\frac{12}{25}$ . $\frac{127}{56}$ – $\frac{1}{25}$
= $\frac{254}{575}$ – $\frac{1}{25}$
= $\frac{254}{575}$ – $\frac{23}{575}$
= $\frac{231}{575}$
HỌC TỐT NHA !
#NOCOPY
Mình nghĩ bạn ghi sai đề á
$\text { Đáp án: }$
` –12/25 : 7/8 + (–9/8) . 12/25 – 1/25 `
` = –12/25 . 8/7 + 9/8 . (–12/25) – 1/25 `
` = –12/25 . ( 9/8 + 8/7 ) – 1/25 `
` = –12/25 . 127/56 – 1/25 `
` = 254/575 – 1/25 `
` = 231/575 `