六年级小学奥数举一反三A版163 1/13÷41 1/39=多少
来源:百度知道 编辑:UC知道 时间:2024/06/01 15:23:44
简便运算哦!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
163 1/13÷41 1/39
=(160+43又1/13)÷41 1/39
=160*(39/160)+560/13*(39/160)
=39+10又1/2
=49又1/2
163 1/13÷41 1/39
=(123 1/13+40)÷41 1/39
=123 1/13÷41 1/39+40÷41 1/39
=3+40÷(41×39+1)/39
=3+40×39/(41×39+1)
=3+40×39/ [(40+1)×39+1]
=3+40×39/(40×39+1×39+1)
=3+40×39/(40×39+40)
=3+40×39/(40×40)
=3+39/40
=3 39/40
即3又39/40
你这题让人产生歧义,不解
4又39/40