(2 3/20 + 1 5/16) : (30 - 2 3/10) + 5 1/7 * 3 17/20 - 14 3/20 = 5 31/40
1) 2 3/20 + 1 5/16 = 2 12/80 + 1 25/80 = 3 37/80
2) 30 - 2 3/10 = 29 10/10 - 2 3/10 = 27 7/10
3) 3 37/80 : 27 7/10 = 277/80 : 277/10 = 277/80 * 10/277 = 1/8
4) 5 1/7 * 3 17/20 = 36/7 * 77/20 = 99/5 = 19 4/5
5) 1/8 + 19 4/5 = 5/40 + 19 32/40 = 19 37/40
6) 19 37/40 - 14 3/20 = 19 37/40 - 14 6/40 = 5 31/40
(467+385)-298=563
(724-257)-198=467
(194+609)+38=861
<span>5/16-1/6= 30/96-16/96=14/96=7/48
</span><span>
1)-7+x=13
х=13+7
х=20
2)x+(-9)=-4
х=-4+9
х=5
3)x+(-15)=10
х=10+15
х=25
4)8+x=-12
х=-12-8
х=-20
5)x+(-14)=-8
х=-8+14
х=6</span>