题目内容

怎样简便怎样算
2.65×101
(2.4×
5
8
+3.6÷
3
4
)×
12
7

5
8
×
11
10
+
3
8
÷
10
11

999
8
9
+99
8
9
+9
8
9
+
1
3
(1)2.65×101,
=2.65×100+2.65,
=265+2.65,
=267.65;

(2)(2.4×
5
8
+3.6÷
3
4
)×
12
7

=(1.5+3.6×
4
3
)×
12
7

=(1.5+4.8)×
12
7

=6.3×
12
7

=10.8;

(3)
5
8
×
11
10
+
3
8
÷
10
11

=(
5
8
+
3
8
)×
11
10

=1×
11
10

=1
1
10


(4)999
8
9
+99
8
9
+9
8
9
+
1
3

=(999
8
9
+
1
9
)+(99
8
9
+
1
9
)+(9
8
9
+
1
9
),
=1000+100+10,
=1110.
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