题目内容

（15＋9）×（78－59）=

[　　]

A．456
B．16
C．24
D．19
答案：A
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直接写得数．
698+560=		 1200-909= 1.3+0.41= 500÷5÷20=
2.7-1.58= 2.5×0.4= 1.4÷3.5= 3.65+0.36×0=
452.4÷48.9≈ 201.2×39≈
3
4
-
2
3
=		 6-
5
7
-
2
7
=
1.65+0.8= 3.6-0.36= 1÷
1
5
=		 8.4+99×8.4=
7
8
×
1
7
=
1
9
÷
2
3
=
1
3
+
1
2
=		 (
4
5
+
5
6
)×30=
（2013?抚州模拟）
计算（能简算的要简算）
①14-18.9÷0.18×0.12		 ②5
3
4
-15÷19-
2
19
×2
③（
5
6
+
7
8
-
5
12
）÷
1
24
 ④
9
20
÷[
3
4
×（
3
5
-
1
10
）]
直接写得数．
0.23= 9.7+0.03= 78×99+7.8= 2-0.2%=
4
5
×0÷0.18=
4
5
+
4
3
=		 1-
1
5
×4+4×
1
5
=		 0.18÷0.2=
1.5×8.4+3×0.3+15×10%= 30×（
2
5
+
1
6
-
4
15
）=
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
=
 
．
直接写出得数．
1
12
×6=		 1-
5
8
=
1
2
÷3=		 4+
2
3
=
(
1
4
+
1
3
)×12=
3
4
×
2
3
=		 10÷
1
10
=
5
14
×7=
6
11
÷
6
11
=		 1÷(
1
4
×
1
5
)=
4
5
÷
2
5
=
1
2
×3=
1÷
7
8
=
5
8
-
1
2
=
1
13
×
1
2
×39=		 100×
8
25
=
6
7
÷
2
7
=
1
2
-
1
3
=
8
25
+
4
5
=		 9×(2+
5
9
)=
70÷
7
10
=		 19×
1
38
=
2
9
×
3
5
=
5
6
-
2
3
=
4×
1
4
÷4×
1
4
=

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