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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)(-
)-(+
);
(3)0-(-10)+4-(-15);
(4)49
×(-5);
(5)(-4
)+(-3.75)+(-2
)+(-3
);
(6)(-15)÷(-1.25)×(-3
);
(7)(-7.5)×(-11
)+(-7.5)×1
-(-7.5)×6;
(8)23×(-5)-(-9)÷
;
(9)[30+(
+
-
)×(-36)]÷(-5).
(1)(+41)+(-75);
(2)(-
1 |
6 |
5 |
6 |
(3)0-(-10)+4-(-15);
(4)49
24 |
25 |
(5)(-4
5 |
8 |
3 |
8 |
1 |
4 |
(6)(-15)÷(-1.25)×(-3
1 |
2 |
(7)(-7.5)×(-11
1 |
9 |
1 |
9 |
(8)23×(-5)-(-9)÷
3 |
128 |
(9)[30+(
7 |
9 |
5 |
6 |
11 |
12 |
▼优质解答
答案和解析
(1)(+41)+(-75)=-34
(2)(-
)-(+
)=-1
(3)0-(-10)+4-(-15)
=10+4+15
=29
(4)49
×(-5)
=(50-
)×(-5)
=50×(-5)-
×(-5)
=-250+
=-249
(5)(-4
)+(-3.75)+(-2
)+(-3
)
=(-4
-2
)+(-3.75-3
)
=(-7)+(-7)
=-14
(6)(-15)÷(-1.25)×(-3
)
=12×(-3
)
=-42
(7)(-7.5)×(-11
)+(-7.5)×1
-(-7.5)×6
=(-7.5)×(-11
+1
-6)
=(-7.5)×(-16)
=120
(8)23×(-5)-(-9)÷
=(-115)+384
=269
(9)[30+(
+
-
)×(-36)]÷(-5)
=[30+
×(-36)+
×(-36)-
×(-36)]÷(-5)
=[30-28-30+33]÷(-5)
=5÷(-5)
=-1
(2)(-
1 |
6 |
5 |
6 |
(3)0-(-10)+4-(-15)
=10+4+15
=29
(4)49
24 |
25 |
=(50-
1 |
25 |
=50×(-5)-
1 |
25 |
=-250+
1 |
5 |
=-249
4 |
5 |
(5)(-4
5 |
8 |
3 |
8 |
1 |
4 |
=(-4
5 |
8 |
3 |
8 |
1 |
4 |
=(-7)+(-7)
=-14
(6)(-15)÷(-1.25)×(-3
1 |
2 |
=12×(-3
1 |
2 |
=-42
(7)(-7.5)×(-11
1 |
9 |
1 |
9 |
=(-7.5)×(-11
1 |
9 |
1 |
9 |
=(-7.5)×(-16)
=120
(8)23×(-5)-(-9)÷
3 |
128 |
=(-115)+384
=269
(9)[30+(
7 |
9 |
5 |
6 |
11 |
12 |
=[30+
7 |
9 |
5 |
6 |
11 |
12 |
=[30-28-30+33]÷(-5)
=5÷(-5)
=-1
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