问题 解答题
用递等式计算(能简算的要简算)
(1)2842÷14+74×3;
(2)
3
7
+
5
13
-
3
7
+
5
13

(3)88+99×88;
(4)(
4
5
+
1
4
)÷
7
3
+
7
10
答案

(1)2842÷14+74×3,

=203+222,

=425;

(2)

3
7
+
5
13
-
3
7
+
5
13

=(

3
7
-
3
7
)+(
5
13
+
5
13
),

=0+

10
13

=

10
13

(3)88+99×88,

=88×(1+99),

=88×100,

=8800;

(4)(

4
5
+
1
4
)÷
7
3
+
7
10

=

21
20
×
3
7
+
7
10

=

9
20
+
14
20

=

23
20

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