问题 解答题
用递增式计算下列各题.
①914-316÷79×208
②2.37+1.75+1.63+1.25
9
20
×
11
25
+
14
25
×
9
20

2
3
+(
1
2
+
2
3
2
7
答案

①914-316÷79×208

=914-4×208,

=914-832,

=82;

②2.37+1.75+1.63+1.25

=(2.37+1.63)+(1.75+1.25),

=4+3,

=7;

9
20
×
11
25
+
14
25
×
9
20

=(

11
25
+
14
25
)×
9
20

=1×

9
20

=

9
20

2
3
+(
1
2
+
2
3
2
7

=

2
3
+
7
6
×
2
7

=

2
3
+
1
3

=1.

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