Question

2,5 * (2/5) в квадрате - 11,2 : 7/9

Answer 1

2,5*(2/5)^2-11,2:(7/9)=-14
1) 25/10*4/25=100/250=2/5=0,4;
2) 112/10:7/9=(112*9)/(10*7)=1008/70=14,4;
3) 0,4-14,4=-14;