早教吧 育儿知识 作业答案 考试题库 百科 知识分享

计算题:(1)312+(−12)−(−13)+223(2)(23−14−38+524)×48(3)-18÷(-3)2+5×(−12)2-(-15)÷5(4)[-38-(-1)7+(-3)8]×[-52].

题目详情
计算题:
(1)3
1
2
+(−
1
2
)−(−
1
3
)+2
2
3

(2)(
2
3
1
4
3
8
+
5
24
)×48
(3)-18÷(-3)2+5×(−
1
2
)2-(-15)÷5
(4)[-38-(-1)7+(-3)8]×[-52].

1
2
+(−
1
2
)−(−
1
3
)+2
2
3

(2)(
2
3
1
4
3
8
+
5
24
)×48
(3)-18÷(-3)2+5×(−
1
2
)2-(-15)÷5
(4)[-38-(-1)7+(-3)8]×[-52].
1
2
1122
1
2
1122
1
3
1133
2
3

(2)(
2
3
1
4
3
8
+
5
24
)×48
(3)-18÷(-3)2+5×(−
1
2
)2-(-15)÷5
(4)[-38-(-1)7+(-3)8]×[-52].
2
3
2233
(
2
3
1
4
3
8
+
5
24
)×48
(3)-18÷(-3)2+5×(−
1
2
)2-(-15)÷5
(4)[-38-(-1)7+(-3)8]×[-52].
2
3
2233
1
4
1144
3
8
3388
5
24
552424
2(−
1
2
)2-(-15)÷5
(4)[-38-(-1)7+(-3)8]×[-52].
1
2
1122)2-(-15)÷5
(4)[-38-(-1)7+(-3)8]×[-52].
)2-(-15)÷5
(4)[-38-(-1)7+(-3)8]×[-52].
2-(-15)÷5
(4)[-38-(-1)7+(-3)8]×[-52].

8782
▼优质解答
答案和解析
(1)3
1
2
+(−
1
2
)−(−
1
3
)+2
2
3

=(3
1
2
-
1
2
)+(
1
3
+2
2
3

=3+3
=6;

(2)(
2
3
1
4
3
8
+
5
24
)×48
=32-12-18+10
=42-30
=12;

(3)-18÷(-3)2+5×(−
1
2
)2-(-15)÷5
=-18÷9+5×
1
4
+3
=-2+1.25+3
=2.25;

(4)[-38-(-1)7+(-3)8]×[-52]
=[-38+38+1]×(-25)
=1×(-25)
=-25.
1
2
111222+(−
1
2
111222)−(−
1
3
111333)+2
2
3

=(3
1
2
-
1
2
)+(
1
3
+2
2
3

=3+3
=6;

(2)(
2
3
1
4
3
8
+
5
24
)×48
=32-12-18+10
=42-30
=12;

(3)-18÷(-3)2+5×(−
1
2
)2-(-15)÷5
=-18÷9+5×
1
4
+3
=-2+1.25+3
=2.25;

(4)[-38-(-1)7+(-3)8]×[-52]
=[-38+38+1]×(-25)
=1×(-25)
=-25.
2
3
222333
=(3
1
2
-
1
2
)+(
1
3
+2
2
3

=3+3
=6;

(2)(
2
3
1
4
3
8
+
5
24
)×48
=32-12-18+10
=42-30
=12;

(3)-18÷(-3)2+5×(−
1
2
)2-(-15)÷5
=-18÷9+5×
1
4
+3
=-2+1.25+3
=2.25;

(4)[-38-(-1)7+(-3)8]×[-52]
=[-38+38+1]×(-25)
=1×(-25)
=-25.
1
2
111222-
1
2
)+(
1
3
+2
2
3

=3+3
=6;

(2)(
2
3
1
4
3
8
+
5
24
)×48
=32-12-18+10
=42-30
=12;

(3)-18÷(-3)2+5×(−
1
2
)2-(-15)÷5
=-18÷9+5×
1
4
+3
=-2+1.25+3
=2.25;

(4)[-38-(-1)7+(-3)8]×[-52]
=[-38+38+1]×(-25)
=1×(-25)
=-25.
1
2
111222)+(
1
3
+2
2
3

=3+3
=6;

(2)(
2
3
1
4
3
8
+
5
24
)×48
=32-12-18+10
=42-30
=12;

(3)-18÷(-3)2+5×(−
1
2
)2-(-15)÷5
=-18÷9+5×
1
4
+3
=-2+1.25+3
=2.25;

(4)[-38-(-1)7+(-3)8]×[-52]
=[-38+38+1]×(-25)
=1×(-25)
=-25.
1
3
111333+2
2
3

=3+3
=6;

(2)(
2
3
1
4
3
8
+
5
24
)×48
=32-12-18+10
=42-30
=12;

(3)-18÷(-3)2+5×(−
1
2
)2-(-15)÷5
=-18÷9+5×
1
4
+3
=-2+1.25+3
=2.25;

(4)[-38-(-1)7+(-3)8]×[-52]
=[-38+38+1]×(-25)
=1×(-25)
=-25.
2
3
222333)
=3+3
=6;

(2)(
2
3
1
4
3
8
+
5
24
)×48
=32-12-18+10
=42-30
=12;

(3)-18÷(-3)2+5×(−
1
2
)2-(-15)÷5
=-18÷9+5×
1
4
+3
=-2+1.25+3
=2.25;

(4)[-38-(-1)7+(-3)8]×[-52]
=[-38+38+1]×(-25)
=1×(-25)
=-25.
(
2
3
222333−
1
4
111444−
3
8
333888+
5
24
555242424)×48
=32-12-18+10
=42-30
=12;

(3)-18÷(-3)22+5×(−
1
2
)2-(-15)÷5
=-18÷9+5×
1
4
+3
=-2+1.25+3
=2.25;

(4)[-38-(-1)7+(-3)8]×[-52]
=[-38+38+1]×(-25)
=1×(-25)
=-25.
(−
1
2
111222)2-(-15)÷5
=-18÷9+5×
1
4
+3
=-2+1.25+3
=2.25;

(4)[-38-(-1)7+(-3)8]×[-52]
=[-38+38+1]×(-25)
=1×(-25)
=-25.
2-(-15)÷5
=-18÷9+5×
1
4
+3
=-2+1.25+3
=2.25;

(4)[-38-(-1)7+(-3)8]×[-52]
=[-38+38+1]×(-25)
=1×(-25)
=-25.
1
4
111444+3
=-2+1.25+3
=2.25;

(4)[-388-(-1)77+(-3)88]×[-522]
=[-388+388+1]×(-25)
=1×(-25)
=-25.