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计算(1)(+41)+(-75);(2)(-16)-(+56);(3)0-(-10)+4-(-15);(4)492425×(-5);(5)(-458)+(-3.75)+(-238)+(-314);(6)(-15)÷(-1.25)×(-312);(7)(-7.5)×(-1119

题目详情
计算
(1)(+41)+(-75);
(2)(-
1
6
)-(+
5
6
);
(3)0-(-10)+4-(-15);
(4)49
24
25
×(-5);
(5)(-4
5
8
)+(-3.75)+(-2
3
8
)+(-3
1
4
);
(6)(-15)÷(-1.25)×(-3
1
2
);
(7)(-7.5)×(-11
1
9
)+(-7.5)×1
1
9
-(-7.5)×6;
(8)23×(-5)-(-9)÷
3
128

(9)[30+(
7
9
+
5
6
-
11
12
)×(-36)]÷(-5).
▼优质解答
答案和解析
(1)(+41)+(-75)=-34

(2)(-
1
6
)-(+
5
6
)=-1

(3)0-(-10)+4-(-15)
=10+4+15
=29

(4)49
24
25
×(-5)
=(50-
1
25
)×(-5)
=50×(-5)-
1
25
×(-5)
=-250+
1
5

=-249
4
5


(5)(-4
5
8
)+(-3.75)+(-2
3
8
)+(-3
1
4

=(-4
5
8
-2
3
8
)+(-3.75-3
1
4

=(-7)+(-7)
=-14

(6)(-15)÷(-1.25)×(-3
1
2

=12×(-3
1
2

=-42

(7)(-7.5)×(-11
1
9
)+(-7.5)×1
1
9
-(-7.5)×6
=(-7.5)×(-11
1
9
+1
1
9
-6)
=(-7.5)×(-16)
=120

(8)23×(-5)-(-9)÷
3
128

=(-115)+384
=269

(9)[30+(
7
9
+
5
6
-
11
12
)×(-36)]÷(-5)
=[30+
7
9
×(-36)+
5
6
×(-36)-
11
12
×(-36)]÷(-5)
=[30-28-30+33]÷(-5)
=5÷(-5)
=-1