1 )8/11×11/13 = 8/13
2)7/10×25/27 = 35/52
3) 5/7÷/7
4) 16/25÷3/5 = 16/25*5/3 = 16/5*1/3 = 16/15 = 1 1/5
8*1000=8000кг 94ц*100=9400кг 8000+9400=17400кг
(-3,25-(-1,75)):(-0,6)+0,8*(-7)=(-3,25+1,75:(-0,6))-0,56=-2,5-0,56=-3,06
27°=(27*π)/180=(3π) /20
(4π)/11=(4π*180)/π=720/11=65 (5/11)°