计算:(1)22+(-4)+(-2)+4;(2)(-8)+(+0.25)-(-9)+(-14);(3)(134-78-712)×(-117);(4)(-730)÷(35-16-23);(5)(113+

题目简介

计算:(1)22+(-4)+(-2)+4;(2)(-8)+(+0.25)-(-9)+(-14);(3)(134-78-712)×(-117);(4)(-730)÷(35-16-23);(5)(113+

题目详情

计算:
(1)22+(-4)+(-2)+4;               
(2)(-8)+(+0.25)-(-9)+(-
1
4
)

(3)(1
3
4
-
7
8
-
7
12
)×(-1
1
7
);             
(4)(-
7
30
)÷(
3
5
-
1
6
-
2
3
);
(5)(1
1
3
+
1
8
-2.75)×(-24)-|-2|3
;      
(6)19×
2
5
-0.4×(-18)+
2
5
×(-19)
题型:解答题难度:中档来源:不详

答案

(1)原式=22-2=20;
(2)原式=-8+class="stub"1
4
+9-class="stub"1
4
=1;
(3)原式=(class="stub"7
4
-class="stub"7
8
-class="stub"7
12
)×(-class="stub"8
7
)=class="stub"7
4
×(-class="stub"8
7
)-class="stub"7
8
×(-class="stub"8
7
)-class="stub"7
12
×(-class="stub"8
7
)=-2+1+class="stub"2
3
=-class="stub"1
3

(4)原式=-class="stub"7
30
÷(class="stub"18
30
-class="stub"5
30
-class="stub"20
30
)=-class="stub"7
30
÷(-class="stub"7
30
)=1;
(5)原式=(class="stub"4
3
+class="stub"1
8
-class="stub"11
4
)×(-24)-8=class="stub"4
3
×(-24)+class="stub"1
8
×(-24)-class="stub"11
4
×(-24)-8=-32-3+66-8=23;
(6)原式=(19+18-19)×class="stub"2
5
=18×class="stub"2
5
=class="stub"36
5

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