问题 解答题
计算,能简算的要简算.
(1)46.7-15.03-4.97                  
(2)709-4832÷16
(3)(
1
9
+
1
27
)÷4+
27
23
        
(4)
2
3
×[
9
10
+(
7
16
-
1
4
)].
答案

(1)46.7-15.03-4.97

=46.7-(15.03+4.97),

=46.7-20,

=26.7;

(2)709-4832÷16

=709-4832÷(8×2),

=709-4832÷8÷2,

=709-604÷2,

=709-302,

=407;

(3)(

1
9
+
1
27
)÷4+
27
23
 

=

4
27
÷4+
27
23

=

1
27
+
27
23

=1

131
621

(4)

2
3
×[
9
10
+(
7
16
-
1
4
)]

=

2
3
×[
9
10
+
3
16
],

=

2
3
×
9
10
+
2
3
×
3
16

=

3
5
+
1
8

=

29
40

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