6 tháng 10 2022 lúc 20:39
1)59+[25-(3-1)2]
=59+[25-24]
=59+[25-16]
=59+9
=68
2)20+[125-(5-2)3]
=20+[125-33]
=20+[125-27]
=20+98
=118
3)15.[87-(5-1)2]
=15.[87-42]
=15.[87-16]
=15.71
=1065
4)674-[7+(9-6)3]
=674-[7+33]
=674-[7+27]
=674-34
=640
5)[3.7-(3-2)11.8]-9
=[3.7-111.8]-9
=[3.7-1.8]-9
=[21-8]-9
=13-9
4
6)[(2+3)2.2-8]+48
=[52.2-8]+48
=[25.2-8]+48
=[50-8]+48
=42+48
=90
7)2011.[92-32.(5+4)]
=2011.[81-9.9]
=2011.[81-81]
=2011.0
=0
8)32:[16-(7-5)3]
=32:[16-23]
=32:[16-8]
=32:8
=4
9)45+[82:4-(52-2.12)6]
=45+[64:4-(25-2.12)6]
=45+[64:4-(25-24)6]
=45+[64:4-16]
=45+[64:4-1]
=45+[16-1]
=45+15
=50
10)42.[23:(8-6)2+6]
=16.[8:22+6]
=16.[8:4+6]
=16.[2+6]
=16.8
=128
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