计算:(1)9+(-1.4)-(+6)-(-125);(2)(-12)×(34+56-1);(3)(-12)×5+(-5)×(-14)+5×(-34);(4)5+36÷(-3)2×(-12)-(-1)

题目简介

计算:(1)9+(-1.4)-(+6)-(-125);(2)(-12)×(34+56-1);(3)(-12)×5+(-5)×(-14)+5×(-34);(4)5+36÷(-3)2×(-12)-(-1)

题目详情

计算:
(1)9+(-1.4)-(+6)-(-1
2
5
);
(2)(-12)×(
3
4
+
5
6
-1
);
(3)(-
1
2
)×5+(-5)×(-
1
4
)+5×(-
3
4
)

(4)5+36÷(-3)2×(-
1
2
)-(-1)2013
题型:解答题难度:中档来源:不详

答案

(1)原式=9-1.4-6+1class="stub"2
5

=9-6+1class="stub"2
5
-1.4
=3;

(2)原式=(-12)×class="stub"3
4
+(-12)×class="stub"5
6
-(-12)×1
=-9-10+12
=-19+12
=-7;

(3)原式=(-5)×(class="stub"1
2
-class="stub"1
4
+class="stub"3
4

=(-5)×1
=-5;

(4)原式=5+36÷9×(-class="stub"1
2
)-(-1)
=5+4×(-class="stub"1
2
)+1
=5-2+1
=4.

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