4 3/5+2 5/7+5 9/35=4 21/35 + 2 25/35 + 5 9/35 = 11 55/35 = 12 20/35 = 12 4/7
1 2/3+6 4/15+8 17/45= 1 30/45 + 6 12/45 + 8 17/45 = 15 53/45 = 16 8/45
8 3/40+12 11/20+6 7/80 = 8 6/80 + 12 44/80 + 6 7/80 = 26 57/80
1) 500:500=1
2)700:1=700
3)700-20=680
Ответ:680
1) 103,5 см³ (abc 4,5*2,3*10)
2)116,25 дм³ (abc 3,1*1,5*2,5)
47,3p-(7,3p+18,61)-1,39 = 40p-20
5%-0,12
100%-x x=100*0,12/5 = 2,4
40*2,4-20=96-20=76