14×16÷2=25.12 答:这个半圆形的面积是25.12平方厘米. 查看更多

 

题目列表(包括答案和解析)

(2012?海港区)直接写得数
343-289= 32+82= 1322-199= 49×
2
21
=
1-3÷7=
5×4×2= 6÷2%= 1.87+5.13=
1
12
÷6=
3
4
×4×
3
4
=
9.9÷0.1= 0.35×200= 0.32-0.22=
4
5
×25=
1
8
+
1
4
×16=
2.8×25+12= 41+25= 1-
2
5
=
3
5
÷
3
10
=
1-2×
1
6
=

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3
4
+
1
4
=
 
5
6
-
1
6
=
 
2+
4
9
=
 
1-
7
12
=
 
3-
2
3
=
 
3
4
-
1
2
=
 
2
3
 +
1
5
=
 
 
7
8
+
3
8
=
 
2-
3
5
=
 
1
3
+
1
4
=
 
1
7
+
6
7
=
 
1
2
-
1
3
=
 
3
10
+
1
5
=
 
2
3
+
1
6
=
 
4
5
-
1
5
=
 
2.9+3.7+2.1=
 
1
4
+
1
3
+
3
4
=
 
2-
1
6
-
5
6
=
 
9.2×0.25×4=
 
1
6
+
1
2
+
1
6
=
 

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计算下列各题,能简算的要简算.
10.81-5.25-4.75
3
5
+3.8+0.4+6.2
12×(
1
4
+
1
6
-
1
3
(1-
1
100
×70)÷
2
7
4
5
+
1
4
)÷
7
3
+
7
10
(5-
15
36
×
2
3
)×
6
5

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(2012?资中县模拟)
口算
134-18=
1.01-0.98=
8
9
×
9
24
=
1.5×4=
7.45+8.55=
1
4
+
3
4
×8=
2÷0.25+1.1=
1
6
×6÷
1
6
×6=
5.76-(2.76+0.8)= 108×
1
9
-10=
0.125×17×8= 0.43=

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口算
1.01-0.98=
1
4
+
3
4
×8=
2÷0.25+1.1=
1
6
×6÷
1
6
×6=
5.76÷(2.76+0.8)= 108×
1
9
-10=
0.125×17×8= 0.43=

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