N326
|c|:|12,7|+|-7500|:|k|;
1.-25,4|:|12,7|+|-7500|:|-300|;
25,4:12.7:7500:300;
1)25,4:12,7=2;
2)7500:300=25;
2+25=27.
2.|-31,75|:|12,7|+|-7500|:|-525|;
31,75:12,7:7500:525;
1)31,75:12,7=2,5;
2)7500:525=7500/525;
5/2+7500/525=2625/1050+15000/1050=16 11/14;
N331
1)3 - (-3);
2)0,5 - (-0,5);
3)4 1/2 - (-4 1/2);
4)7,5 - (-7,5)