Предмет: Математика, автор: Polina8939

Выполните сложение:
а) 2/15+1/15+14/15
б) 3/80+7/40
в) 3/100+9/10
г) 2/5+3/10+1/15
Помогите пожалуйста.

Ответы

Автор ответа: miron2077
0
2/15+1/15+14/15=17/15=1 2/15
3/80+7/40=3/80+14/80=17/80
3/100+9/10=3/100+90/100=93/100
2/5+3/10+1/15=12/30+9/30+2/30=23/30
Автор ответа: samotugaa
0
а) 2/15+1/15+14/15=(2+1+14)/15=17/15=1 2/15; б) 3/80+7/40=3/80+14/80=(3+14)/80=17/80; в) 3/100+9/10=3/100+90/100=(3+90)/100=93/100; г) 2/5+3/10+1/15=12/30+9/30+2/30=(12+9+2)/30=23/30.
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