1/3+1/6+1/2= 一又4/5-7/20-9/20= 17/20-(3/8+1/5)= 13/17-(5/17+1/10)+0.9=(全要递等式)能简便就要简便
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![1/3+1/6+1/2= 一又4/5-7/20-9/20= 17/20-(3/8+1/5)= 13/17-(5/17+1/10)+0.9=(全要递等式)能简便就要简便](/uploads/image/z/12059941-13-1.jpg?t=1%2F3%2B1%2F6%2B1%2F2%3D+%E4%B8%80%E5%8F%884%2F5-7%2F20-9%2F20%3D+17%2F20-%EF%BC%883%2F8%2B1%2F5%EF%BC%89%3D+13%2F17-%EF%BC%885%2F17%2B1%2F10%EF%BC%89%2B0.9%3D%EF%BC%88%E5%85%A8%E8%A6%81%E9%80%92%E7%AD%89%E5%BC%8F%EF%BC%89%E8%83%BD%E7%AE%80%E4%BE%BF%E5%B0%B1%E8%A6%81%E7%AE%80%E4%BE%BF)
1/3+1/6+1/2= 一又4/5-7/20-9/20= 17/20-(3/8+1/5)= 13/17-(5/17+1/10)+0.9=(全要递等式)能简便就要简便
1/3+1/6+1/2= 一又4/5-7/20-9/20= 17/20-(3/8+1/5)= 13/17-(5/17+1/10)+0.9=(全要递等式)
能简便就要简便
1/3+1/6+1/2= 一又4/5-7/20-9/20= 17/20-(3/8+1/5)= 13/17-(5/17+1/10)+0.9=(全要递等式)能简便就要简便
1/3+1/6+1/2
=1/3+1/2-1/3+1/2
=1/2+1/2
=1
一又4/5-7/20-9/20
=1+4/5-(7/20+9/20)
=1+4/5-16/20
=1+4/5-4/5
=1
17/20-(3/8+1/5)
=17/20-(15/40+8/40)
=17/20-23/40
=34/40-23/40
=11/40
13/17-(5/17+1/10)+0.9
=13/17-5/17-1/10+9/10
=8/17+8/10
=8/17+4/5
=40/85+68/85
=108/85