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36X3/4+3/4X63+3/44/9X(130X26)X5/265/7+3/4X5/6-3/820-35X(2/5-1/7)2008X2006/2007用最简便方法计算
题目详情
36X3/4+3/4X63+3/4 4/9X(130X26)X5/26 5/7+3/4X5/6-3/8 20-35X(2/5-1/7) 2008X2006/2007用最简便方法计算
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答案和解析
36X3/4+3/4X63+3/4
=3/4(36+63+1)
=3/4X100
=75
4/9X(130X26)X5/26
=4/9X130X5
=2600/9
5/7+3/4X5/6-3/8
=5/7+5/8-3/8
=5/7+1/4
=27/28
20-35X(2/5-1/7)
=20-35X2/5+35X1/7
=20-14+5
=11
2008X2006/2007
=(2007+1)X2006/2007
=2006+2006/2007
=2006又2006/2007
=3/4(36+63+1)
=3/4X100
=75
4/9X(130X26)X5/26
=4/9X130X5
=2600/9
5/7+3/4X5/6-3/8
=5/7+5/8-3/8
=5/7+1/4
=27/28
20-35X(2/5-1/7)
=20-35X2/5+35X1/7
=20-14+5
=11
2008X2006/2007
=(2007+1)X2006/2007
=2006+2006/2007
=2006又2006/2007
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