下面各题怎样算简便就怎样算.(1)36×27×572×42(2)(78+716)÷716(3)67×34+14×67(4)78÷23÷78(5)59×8÷79(6)24×(13+38+712).-数学

题目简介

下面各题怎样算简便就怎样算.(1)36×27×572×42(2)(78+716)÷716(3)67×34+14×67(4)78÷23÷78(5)59×8÷79(6)24×(13+38+712).-数学

题目详情

下面各题怎样算简便就怎样算.
(1)36×
2
7
×
5
72
×42
(2)(
7
8
+
7
16
)÷
7
16
(3)
6
7
×
3
4
+
1
4
×
6
7
(4)
7
8
÷
2
3
÷
7
8
  
(5)
5
9
×8÷
7
9
(6)24×(
1
3
+
3
8
+
7
12
)
题型:解答题难度:中档来源:不详

答案

(1)36×class="stub"2
7
×class="stub"5
72
×42
=(36×class="stub"5
72
)×(class="stub"2
7
×42)
=class="stub"5
2
×12
=30;
(2)(class="stub"7
8
+class="stub"7
16
)÷class="stub"7
16

=class="stub"7
8
×class="stub"16
7
+class="stub"7
16
×class="stub"16
7

=2+1
=3;
(3)class="stub"6
7
×class="stub"3
4
+class="stub"1
4
×class="stub"6
7

=class="stub"6
7
×(class="stub"3
4
+class="stub"1
4

=class="stub"6
7
×1
=class="stub"6
7

(4)class="stub"7
8
÷class="stub"2
3
÷class="stub"7
8

=class="stub"7
8
÷class="stub"7
8
÷class="stub"2
3

=1÷class="stub"2
3

=1class="stub"1
2

(5)class="stub"5
9
×8÷class="stub"7
9

=class="stub"40
9
÷class="stub"7
9

=class="stub"40
7

=5class="stub"5
7

(6)24×(class="stub"1
3
+class="stub"3
8
+class="stub"7
12
)

=24×class="stub"1
3
+24×class="stub"3
8
+24×class="stub"7
12

=8+9+14
=31.

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