Выполните действие (3/8-1/9)+25/36 (7/15-1/6)+2/5 - вопрос №38192536715162589562378132091071816794757 от lawrence02 12.09.2020 14:26

Question

Математика: Выполните действие (3/8-1/9)+25/36 (7/15-1/6)+2/5 (8/9-5/6)+2/3 (7/8-13/20)+9/10 (7/18-1/12)+5/6 (3/4-8/15)+17/20

lawrence02 · Answer

(7/15-1/6)+2/5=14/30-5/30+12/30=21/30 (3/8-1/9)+25/36=27/72-8/72+50/72=69/72 (8/9-5/6)+2/3=32/36-30/36+24/36=26/36 (7/8-13/20)+9/10=35/40-26/40+36/40=45/40=1 целая 5/40
(3/4-8/15)+17/20=45/60-32/60+51/60=64/60= 1 целая 4/60