仔细算一算.78+512+18(23-12)×(23×12)65×23-23×15710÷9+310×1978×47+38×49.-六年级数学

题目简介

仔细算一算.78+512+18(23-12)×(23×12)65×23-23×15710÷9+310×1978×47+38×49.-六年级数学

题目详情

仔细算一算.
7
8
+
5
12
+
1
8

(
2
3
-
1
2
)×(
2
3
×
1
2
)

6
5
×
2
3
-
2
3
×
1
5

7
10
÷9+
3
10
×
1
9

7
8
×
4
7
+
3
8
×
4
9
题型:解答题难度:中档来源:不详

答案

(1)class="stub"7
8
+class="stub"5
12
+class="stub"1
8

=(class="stub"7
8
+class="stub"1
8
)+class="stub"5
12

=1+class="stub"5
12

=1class="stub"5
12


(2)(class="stub"2
3
-class="stub"1
2
)×(class="stub"2
3
×class="stub"1
2
),
=class="stub"1
6
×class="stub"1
3

=class="stub"1
18


(3)class="stub"6
5
×class="stub"2
3
-class="stub"2
3
×class="stub"1
5

=(class="stub"6
5
-class="stub"1
5
)×class="stub"2
3

=1×class="stub"2
3

=class="stub"2
3


(4)class="stub"7
10
÷9+class="stub"3
10
×class="stub"1
9

=class="stub"7
10
×class="stub"1
9
+class="stub"3
10
×class="stub"1
9

=(class="stub"7
10
+class="stub"3
10
)×class="stub"1
9

=1×class="stub"1
9

=class="stub"1
9


(5)class="stub"7
8
×class="stub"4
7
+class="stub"3
8
×class="stub"4
9

=class="stub"1
2
+class="stub"1
6

=class="stub"2
3

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