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计算:(1)20-35+25-10(2)−64÷315×58(3)(512+23−34)×(−12)(4)−22×(−12)+8÷(−2)2

题目详情


−64÷3
1
5
×
5
8

(3)(
5
12
+
2
3
3
4
)×(−12)
(4)22×(−
1
2
)+8÷(−2)2
1
5
1155
5
8
5588
(
5
12
+
2
3
3
4
)×(−12)
(4)22×(−
1
2
)+8÷(−2)2
5
12
551212
2
3
2233
3
4
3344
22×(−
1
2
)+8÷(−2)2
22×(−
1
2
)+8÷(−2)2
22×(−
1
2
)+8÷(−2)2
2×(−
1
2
)+8÷(−2)2
1
2
1122)2)22
▼优质解答
答案和解析
(1)20-35+25-10
=20+25+[(-35)+(-10)]
=45+(-45)
=0;
(2)−64÷3
1
5
×
5
8

=-64×
5
16
×
5
8

=-
25
2

(3)(
5
12
+
2
3
3
4
)×(−12)
=
5
12
×(-12)+
2
3
×(-12)-
3
4
×(-12)
=-5-8+9
=-4;
(4)−22×(−
1
2
)+8÷(−2)2
=-4×(-
1
2
)+8÷4
=2+2
=4.
−64÷3
1
5
111555×
5
8
555888
=-64×
5
16
×
5
8

=-
25
2

(3)(
5
12
+
2
3
3
4
)×(−12)
=
5
12
×(-12)+
2
3
×(-12)-
3
4
×(-12)
=-5-8+9
=-4;
(4)−22×(−
1
2
)+8÷(−2)2
=-4×(-
1
2
)+8÷4
=2+2
=4.
5
16
555161616×
5
8

=-
25
2

(3)(
5
12
+
2
3
3
4
)×(−12)
=
5
12
×(-12)+
2
3
×(-12)-
3
4
×(-12)
=-5-8+9
=-4;
(4)−22×(−
1
2
)+8÷(−2)2
=-4×(-
1
2
)+8÷4
=2+2
=4.
5
8
555888
=-
25
2

(3)(
5
12
+
2
3
3
4
)×(−12)
=
5
12
×(-12)+
2
3
×(-12)-
3
4
×(-12)
=-5-8+9
=-4;
(4)−22×(−
1
2
)+8÷(−2)2
=-4×(-
1
2
)+8÷4
=2+2
=4.
25
2
252525222;
(3)(
5
12
+
2
3
3
4
)×(−12)
=
5
12
×(-12)+
2
3
×(-12)-
3
4
×(-12)
=-5-8+9
=-4;
(4)−22×(−
1
2
)+8÷(−2)2
=-4×(-
1
2
)+8÷4
=2+2
=4.
(
5
12
555121212+
2
3
222333−
3
4
333444)×(−12)
=
5
12
×(-12)+
2
3
×(-12)-
3
4
×(-12)
=-5-8+9
=-4;
(4)−22×(−
1
2
)+8÷(−2)2
=-4×(-
1
2
)+8÷4
=2+2
=4.
5
12
555121212×(-12)+
2
3
×(-12)-
3
4
×(-12)
=-5-8+9
=-4;
(4)−22×(−
1
2
)+8÷(−2)2
=-4×(-
1
2
)+8÷4
=2+2
=4.
2
3
222333×(-12)-
3
4
×(-12)
=-5-8+9
=-4;
(4)−22×(−
1
2
)+8÷(−2)2
=-4×(-
1
2
)+8÷4
=2+2
=4.
3
4
333444×(-12)
=-5-8+9
=-4;
(4)−22×(−
1
2
)+8÷(−2)2
=-4×(-
1
2
)+8÷4
=2+2
=4.
−22×(−
1
2
)+8÷(−2)2
=-4×(-
1
2
)+8÷4
=2+2
=4.
2×(−
1
2
111222)+8÷(−2)2
=-4×(-
1
2
)+8÷4
=2+2
=4.
2
=-4×(-
1
2
)+8÷4
=2+2
=4.
1
2
111222)+8÷4
=2+2
=4.