1.-4 и -25 и|-4|+|-25| =29 или|-29|
2.\-8.4\+\-3.7\=\-12.1\ или 12.1
1.5.25*3.4-0.05*0.12=17.85-0.006=17.844
2.(1 1\9-5 1\5)\(-1\5+2.1)= -3 41\45 \ 19\10=352\171=2 10\171
1.х-3.5=-3.5*0.7
х-3.5=-2.45
х=-2.45+3.5
х=1.05
1.1\42 и1\30 5\210и 7.210
2.5\6 / 2\9 и 7\12 45/12 и7\12