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怎样简便就怎样算(229+329)×29×23713-0.4+613-35(8.26+8.26+8.26+8.26)×2.5(29×35)×9×5.

题目详情
怎样简便就怎样算
(
2
29
+
3
29
)×29×23                
7
13
-0.4+
6
13
-
3
5

(8.26+8.26+8.26+8.26)×2.5        
2
9
×
3
5
)×9×5.
▼优质解答
答案和解析
(1)(
2
29
+
3
29
)×29×23   
=
2
29
×29×23+
3
29
×29×23
=46+69
=115;

(2)
7
13
-0.4+
6
13
-
3
5

=
7
13
+
6
13
-(
2
5
+
3
5

=1-1
=0

(3)(8.26+8.26+8.26+8.26)×2.5
=8.26×4×2.5
=8.26×(4×2.5)
=8.26×10
=82.6

(4)(
2
9
×
3
5
)×9×5
=(
2
9
×9)×(
3
5
×5)
=2×3
=6