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简便计算.25+235+5.75+6.425×101712×13+1112×759×314+37×59.

题目详情
简便计算.
25+2
3
5
+5.75+6.4              
25×101
7
12
×13+
11
12
×7                    
5
9
×
3
14
+
3
7
×
5
9
▼优质解答
答案和解析
(1)25+2
3
5
+5.75+6.4,
=(25+5.75)+(2.6+6.4),
=30.75+9,
=39.75;

(2)25×101,
=25×100+25×1,
=2500+25,
=2525;

(3)
7
12
×13+
11
12
×7,
=
7
12
×13+
7
12
×11,
=
7
12
×(13+11),
=
7
12
×24,
=14;

(4)
5
9
×
3
14
+
3
7
×
5
9

=
5
9
×(
3
14
+
3
7
),
=
5
9
×
9
14

=
5
14