计算下面各题,能简便的要用简便方法计算.(15+23)×154-915÷95-2365×67-67÷574÷(23+12)×45.-数学

题目简介

计算下面各题,能简便的要用简便方法计算.(15+23)×154-915÷95-2365×67-67÷574÷(23+12)×45.-数学

题目详情

计算下面各题,能简便的要用简便方法计算.
(
1
5
+
2
3
)×15
4-
9
15
÷
9
5
-
2
3
6
5
×
6
7
-
6
7
÷5
7
4
÷(
2
3
+
1
2
)×
4
5
题型:解答题难度:中档来源:不详

答案


(1)(class="stub"1
5
+class="stub"2
3
)×15

=class="stub"1
5
×15+class="stub"2
3
×15

=3+10,
=13;

(2)4-class="stub"9
15
÷class="stub"9
5
-class="stub"2
3

=4-class="stub"1
3
-class="stub"2
3

=4-(class="stub"1
3
+class="stub"2
3
),
=4-1,
=3;

(3)class="stub"6
5
×class="stub"6
7
-class="stub"6
7
÷5,
=class="stub"6
5
×class="stub"6
7
-class="stub"6
7
×class="stub"1
5

=(class="stub"6
5
-class="stub"1
5
)×class="stub"6
7

=1×class="stub"6
7

=class="stub"6
7


(4)class="stub"7
4
÷(class="stub"2
3
+class="stub"1
2
)×class="stub"4
5

=class="stub"7
4
÷class="stub"7
6
×class="stub"4
5

=class="stub"3
2
×class="stub"4
5

=class="stub"6
5

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