作业帮（简便运算,最好写纸上!
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/01 10:21:19
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（简便运算,最好写纸上!
（简便运算,最好写纸上!
（简便运算,最好写纸上!
20000÷12.5÷25÷0.8÷4
=20000÷(12.5×0.8×25×4)
=2000÷(10×100)
=20000÷1000
=20
45×43/44
=(44+1)×43/44
=44×43/44+1×43/44
=43+43/44
=43又43/44
2-6/13÷9/26-2/3
=2-(4/3+2/3)
=2-2
=0