计算:(1)312-(-13)+(-12)+223(2)-14-16×〔3-(-32)〕×(-2)(3)(-79-1112+16)×(-6)2(4)-22-[2-(1+13×0.5)]÷[32-(-2

题目简介

计算:(1)312-(-13)+(-12)+223(2)-14-16×〔3-(-32)〕×(-2)(3)(-79-1112+16)×(-6)2(4)-22-[2-(1+13×0.5)]÷[32-(-2

题目详情

计算:
(1)3
1
2
-(-
1
3
)+(-
1
2
)+2
2
3

(2)-14-
1
6
×〔3-(-32)〕×(-2)
(3)(-
7
9
-
11
12
+
1
6
)×(-6)2
(4)-22-[2-(1+
1
3
×0.5)]÷[32-(-2)2].
题型:解答题难度:中档来源:不详

答案

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

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

=3+3
=6;

(2)原式=-1-class="stub"1
6
×(3-9)×(-2)
=-1-class="stub"1
6
×(-6)×(-2)
=-1-2
=-3;

(3)原式=(-class="stub"7
9
-class="stub"11
12
+class="stub"1
6
)×36
=-class="stub"7
9
×36-class="stub"11
12
×36+class="stub"1
6
×36
=-28-33+6
=-61+6
=-55;

(4)原式=-4-[2-(1+class="stub"1
6
)]÷[9-4]
=-4-[2-1class="stub"1
6
]÷5
=-4-class="stub"5
6
×class="stub"1
5

=-4-class="stub"1
6

=-4class="stub"1
6

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