计算下面各题(能简便方法计算的,要写出简算过程)416+3.9+556+6.134×45+15×344-(35+35÷125)310÷[25×(538-338)].-数学

题目简介

计算下面各题(能简便方法计算的,要写出简算过程)416+3.9+556+6.134×45+15×344-(35+35÷125)310÷[25×(538-338)].-数学

题目详情

计算下面各题(能简便方法计算的,要写出简算过程)
4
1
6
+3.9+5
5
6
+6.1
3
4
×
4
5
+
1
5
×
3
4

4-(
3
5
+
3
5
÷
12
5

3
10
÷[
2
5
×(5
3
8
-3
3
8
)].
题型:解答题难度:中档来源:不详

答案

(1)4class="stub"1
6
+3.9+5class="stub"5
6
+6.1
=(4class="stub"1
6
+5class="stub"5
6
)+(3.9+6.1),
=10+10,
=20;

(2)class="stub"3
4
×class="stub"4
5
+class="stub"1
5
×class="stub"3
4

=class="stub"3
4
×(class="stub"4
5
+class="stub"1
5
),
=class="stub"3
4


(3)4-(class="stub"3
5
+class="stub"3
5
÷class="stub"12
5

=4-(class="stub"3
5
+class="stub"3
5
×class="stub"5
12
),
=4-(class="stub"3
5
+class="stub"1
4
),
=4-(class="stub"12
20
+class="stub"5
20
),
=4-class="stub"17
20

=3class="stub"3
20


(4)class="stub"3
10
÷[class="stub"2
5
×(5class="stub"3
8
-3class="stub"3
8
)]
=class="stub"3
10
÷[class="stub"2
5
×2],
=class="stub"3
10
×class="stub"5
4

=class="stub"3
8

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