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giúp mình với ạ cần hơi gấp xíuuuu
học sinh nam là số lớn
học sinh nữ là số bé
Số học sinh nam lớp học đó có là :
( 50 + 12 ) : 2 = 31 ( học sinh nam )
Số học sinh nữ lớp học đó có là :
( 50 - 12 ) : 2 = 19 ( học sinh nữ )
Đáp số : 31 học sinh nam
19 học sinh nữ
=20000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 Nha
~HT~
=100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
một người làm trong số ngày hết đoạn đường đó là:
5x20 = 100(ngày)
4 người làm trong số ngày là:
100:4= 25(ngày)
Nho k mik nha
HT
GIẢI
LẮP XONG ĐOẠN ĐƯỜNG CẦN SỐ NGƯỜI LÀ :
20 . 5 = 100 ( NGƯỜI )
4 NGƯỜI LẮP XONG ĐOẠN ĐƯỜNG HẾT SỐ NGÀY LÀ :
100 : 4 = 25 ( NGÀY )
Đ/S : 25 NGÀY
Theo định lý tổng bốn góc trong tứ giác, ta có: \(\widehat{E}+\widehat{F}+\widehat{G}+\widehat{H}=360^o\)
Theo đề ra: \(\hept{\begin{cases}\widehat{E}=70^o\\\widehat{F}=80^o\end{cases}\Rightarrow\widehat{G}+\widehat{H}=360^o-70^o-80^o=210^o}\)
Theo đề ra: \(\widehat{G}-\widehat{H}=20^o\Rightarrow\hept{\begin{cases}\widehat{G}=\frac{210^o+20^o}{2}=115^o\\\widehat{H}=115^o-20^o=95^o\end{cases}}\)