4-4/13÷8/39+3/2(간편 한 방법 으로.)

4-4/13÷8/39+3/2(간편 한 방법 으로.)

원 식=4-4/13*39/8+3/2=4-(4/13*39/8)+3/2=4-3/2+3/2=4-3=1