(12-12)×(12+12)12÷7+12×121-(12+12)÷1212÷12+12×12(12+12-12)×122-12÷12-1299×12.-数学

题目简介

(12-12)×(12+12)12÷7+12×121-(12+12)÷1212÷12+12×12(12+12-12)×122-12÷12-1299×12.-数学

题目详情

1
2
-
1
2
)×(
1
2
+
1
2
1
2
÷7+
1
2
×
1
2
1-(
1
2
+
1
2
)÷
1
2
1
2
÷
1
2
+
1
2
×
1
2
1
2
+
1
2
-
1
2
)×12
2-
1
2
÷
1
2
-
1
2
99×
1
2
题型:解答题难度:中档来源:不详

答案


(1)(class="stub"1
2
-class="stub"1
2
)×(class="stub"1
2
+class="stub"1
2

=0×1
=0

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

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

=class="stub"1
2
×(class="stub"1
7
+class="stub"1
2

=class="stub"1
2
×class="stub"9
14

=class="stub"9
28


(3)1-(class="stub"1
2
+class="stub"1
2
)÷class="stub"1
2

=1-1÷class="stub"1
2

=1-2
=-1

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

=1+class="stub"1
4

=1class="stub"1
4


(5)(class="stub"1
2
+class="stub"1
2
-class="stub"1
2
)×12
=class="stub"1
2
×12+class="stub"1
2
×12-class="stub"1
2
×12
=6+6-6
=12-6
=6

(6)2-class="stub"1
2
÷class="stub"1
2
-class="stub"1
2

=2-1-class="stub"1
2

=1-class="stub"1
2

=class="stub"1
2


(7)99×class="stub"1
2

=(100-1)×class="stub"1
2

=100×class="stub"1
2
-1×class="stub"1
2

=50-class="stub"1
2

=49class="stub"1
2

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