1) 36:15=2,4 (кг) - 1\%
Sin7π/12*cos π/12-sinπ/12*cis7π/12=sin(7π/12-π/12)=sin6π/12=sinπ/2=1
1,2*3000=3600
3*2=6
4500*3=13500
200*1,5=300
50*1,8=90
1,25*700=875
72:9-3=5;
480:(6*8)*7=70;
270:3*2:(6*5)=6;
847-94*8=95
последнее равно:738