1/7+2/3-1/2=/2+1/4+1/8=/12+5/6-3/4=/8+1/10-7/25=/60-19/80+21/40=/33+13/44-26/55= - вопрос №51150051723122141812563481107256019802140331344 от kceniaart18 04.08.2020 01:23

Question

Математика: 1/7+2/3-1/2=/2+1/4+1/8=/12+5/6-3/4=/8+1/10-7/25=/60-19/80+21/40=/33+13/44-26/55=

kceniaart18 · Answer

1/7+2/3-1/2=6/42+28/42-21/42=13/42;
1/2+1/4+1/8=4/8+2/8+1/8=7/8;
5/12+5/6-3/4=5/12+10/12-9/12=6/12=1/2;
5/8+1/10-7/25=125/200+20/200-56/200=89/200;
17/60-19/80+21/40=51/240-57/270+126/240=120/240=1/2;
21/33+13/44-26/55=420/660+195/660-312/660=303/660=101/220