计算:(1)(-3)+(-4)-(+11)-(-9);(2)-534-[-1.5-(4.5-434)];(3)(23-112-115)×(-60);(4)(-81)÷94×49÷(-16);(5)-1

题目简介

计算:(1)(-3)+(-4)-(+11)-(-9);(2)-534-[-1.5-(4.5-434)];(3)(23-112-115)×(-60);(4)(-81)÷94×49÷(-16);(5)-1

题目详情

计算:
(1)(-3)+(-4)-(+11)-(-9);
(2)-5
3
4
-[-1.5-(4.5-4
3
4
)]

(3)(
2
3
-
1
12
-
1
15
)×(-60)

(4)(-81)÷
9
4
×
4
9
÷(-16)

(5)-14÷(-52)×(-
5
3
)+|0.8-1|

(6)
1
4
×(-23
4
5
-(-8)÷[(-0.2)2-(-0.96) ] 
题型:解答题难度:中档来源:不详

答案

(1)(-3)+(-4)-(+11)-(-9)=-3-4-11+9=-18+9=-9;
(2)-5class="stub"3
4
-[-1.5-(4.5-4class="stub"3
4
)]
=-5class="stub"3
4
-(-1.5-4.5+4class="stub"3
4
)
=-5class="stub"3
4
+1.5+4.5-4class="stub"3
4
=-class="stub"39
4
+6=-class="stub"15
4

(3)(class="stub"2
3
-class="stub"1
12
-class="stub"1
15
)×(-60)
=class="stub"2
3
×(-60)-class="stub"1
12
×(-60)-class="stub"1
15
×(-60)
=-40+5+4=-31;
(4)(-81)÷class="stub"9
4
×class="stub"4
9
÷(-16)
=81×class="stub"4
9
×class="stub"4
9
×class="stub"1
16
=1;
(5)-14÷(-52)×(-class="stub"5
3
)+|0.8-1|
=-1×(-class="stub"1
25
)×(-class="stub"5
3
)
+0.2=-class="stub"1
15
+class="stub"1
5
=class="stub"2
15

(6)class="stub"1
4
×(-23)÷class="stub"4
5
-(-8)÷[(-0.2)2-(-0.96) ] 
=class="stub"1
4
×(-8)×(class="stub"5
4
)
-(-8)÷(0.04+0.96)=-2.25-(-8)=5.75.

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