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计算,能简算的要简算.(1)46.7-15.03-4.97(2)709-4832÷16(3)(19+127)÷4+2723(4)23×[910+(716-1

题目详情
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
)].
▼优质解答
答案和解析
(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