列式计算,能简便运算的可以采用简便运算.24×34×56;34÷18×59;36×(34+89);27+57×115;518÷(13÷56);28×38+28×58.-数学

题目简介

列式计算,能简便运算的可以采用简便运算.24×34×56;34÷18×59;36×(34+89);27+57×115;518÷(13÷56);28×38+28×58.-数学

题目详情

列式计算,能简便运算的可以采用简便运算.
24×
3
4
×
5
6

3
4
÷
1
8
×
5
9

36×(
3
4
+
8
9
);
2
7
+
5
7
×
1
15

5
18
÷(
1
3
÷
5
6
);
28×
3
8
+28×
5
8
题型:解答题难度:中档来源:不详

答案

(1)24×class="stub"3
4
×class="stub"5
6

=24×(class="stub"3
4
×class="stub"5
6
),
=24×class="stub"15
24

=15;

(2)class="stub"3
4
÷class="stub"1
8
×class="stub"5
9

=class="stub"3
4
×8×class="stub"5
9

=6×class="stub"5
9

=class="stub"10
3


(3)36×(class="stub"3
4
+class="stub"8
9
),
=36×class="stub"3
4
+36×class="stub"8
9

=27+32,
=59;

(4)class="stub"2
7
+class="stub"5
7
×class="stub"1
15

=class="stub"2
7
+class="stub"1
21

=class="stub"1
3


(5)class="stub"5
18
÷(class="stub"1
3
÷class="stub"5
6
),
=class="stub"5
18
÷class="stub"2
5

=class="stub"25
36


(6)28×class="stub"3
8
+28×class="stub"5
8

=28×(class="stub"3
8
+class="stub"5
8
),
=28×1,
=28.

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