题目内容

口算

(1)37＋5＝
(2)41－3＝
(3)70－6＝
(4)56＋20＝
答案：42;39;64;76
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口算：
3
7
+
2
7
=
2
5
+
1
5
=
2
10
+
2
10
=		 1-
7
8
=
7
9
-
5
9
=
8
9
-
3
9
=
2
7
-
4
7
=		 1-
4
6
=
口算．
37+73= 20×50= 123÷3= 4×50= 80-28= 60×13=
6+0.4= 6-0.4= 3.5+2.8=
1
7
+
5
7
=		 1-
3
5
=
5
9
-
5
9
=
口算
1÷
3
5
=		 0÷3
1
4
=
4
25
×
5
16
=		 2.6-
3
5
=
0.125×8×
3
7
=		 10×0.1%=
14×
4
7
÷4=		 （1+
2
7
）÷4=
（1+
2
7
）×
1
7
=		 99+1%=
（2012?安岳县模拟）口算
56+37= 80-16= 31.5+5= 12-1.1=
2×0.2= 2.87÷0.7= 30÷50= 25×8=
4
15
÷
2
5
=		 12×
2
3
=
3
8
×
4
5
=
1
4
+
1
5
=
1÷
4
5
=		 0×
7
8
=
1
6
+
5
6
=
7
15
-
1
15
=

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