脱式计算(能简算的要简算)(1)16÷[1÷(35-310)](2)3.6-2.8+7.4-7.2(3)87×386+8386.-数学

题目简介

脱式计算(能简算的要简算)(1)16÷[1÷(35-310)](2)3.6-2.8+7.4-7.2(3)87×386+8386.-数学

题目详情

脱式计算(能简算的要简算)
(1)
1
6
÷[1÷(
3
5
-
3
10
)]

(2)3.6-2.8+7.4-7.2
(3)87×
3
86
+
83
86
题型:解答题难度:中档来源:不详

答案

(1)class="stub"1
6
÷[1÷(class="stub"3
5
-class="stub"3
10
)],
=class="stub"1
6
÷[1÷class="stub"3
10
],
=class="stub"1
6
÷class="stub"10
3

=class="stub"1
20


(2)3.6-2.8+7.4-7.2,
=(3.6+7.4)-(2.8+7.2),
=11-10,
=1;

(3)87×class="stub"3
86
+class="stub"83
86

=(86+1)×class="stub"3
86
+class="stub"83
86

=86×class="stub"3
86
+1×class="stub"3
86
+class="stub"83
86

=3+class="stub"3
86
+class="stub"83
86

=3+(class="stub"3
86
+class="stub"83
86
),
=3+1,
=4.

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