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简便计算0.72÷[(21.31+7.49)÷4.8]4.75÷2.5x9+1.95/6-1/4+1/35/2÷10x8/52/3÷[(3/7-3/10)x10][这个是中括号
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简便计算
0.72÷[(21.31+7.49)÷4.8]
4.75÷2.5x9+1.9
5/6-1/4+1/3
5/2÷10x8/5
2/3÷[(3/7-3/10)x10]
[这个是中括号
0.72÷[(21.31+7.49)÷4.8]
4.75÷2.5x9+1.9
5/6-1/4+1/3
5/2÷10x8/5
2/3÷[(3/7-3/10)x10]
[这个是中括号
▼优质解答
答案和解析
0.72÷[(21.31+7.49)÷4.8]
=0.72÷(28.8÷4.8)
=0.72÷6
=0.12
4.75÷2.5x9+1.9
=1.9x9+1.9
=1.9x(9+1)
=1.9x10
=19
5/6-1/4+1/3
=20/24-6/24+8/24
=18/24
=3/4
5/2÷10x8/5
=5/2x8/5x1/10
=4x1/10
=2/5
2/3÷[(3/7-3/10)x10]
=2/3÷(3/7x10-3/10x10)
=2/3÷(30/7-3)
=2/3÷9/7
=2/3x7/9
=14/27
=0.72÷(28.8÷4.8)
=0.72÷6
=0.12
4.75÷2.5x9+1.9
=1.9x9+1.9
=1.9x(9+1)
=1.9x10
=19
5/6-1/4+1/3
=20/24-6/24+8/24
=18/24
=3/4
5/2÷10x8/5
=5/2x8/5x1/10
=4x1/10
=2/5
2/3÷[(3/7-3/10)x10]
=2/3÷(3/7x10-3/10x10)
=2/3÷(30/7-3)
=2/3÷9/7
=2/3x7/9
=14/27
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