1) x = 864 - 395 = 469
2) z = 584 - 213 = 371
3) y = 300 - 206 = 94
4) t = 307 + 308 = 615
5) m = 166 + 34 = 200
6) k = 81 - 59 = 22
<span>832*80=66560
(400-13*20)/10=(400-260)/10=140/10=14
58773/39=1507
3000*1-3000/100=3000-30=2970
8200*982=</span>8052400
=(15/19*19/25)*(7/9*5/7 )=3/5 * 5/9 = 1/3