题目内容

口算。
59+30= 75+7= 42+9=
21+40= 36+5=
89；82；51；61；41
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相关题目
口算．
59÷6=		 30×10= 37÷5= 19÷2=
12×30= 38÷4= 32÷7= 53×20=
口算．
5
9
+
1
9
=
7
8
-
1
16
=
1
8
-
1
9
=
9
10
-
1
10
=
1
4
-
1
8
=
1-
3
11
=
1
6
+
1
7
=
7
8
-
3
8
=
1
6
+
2
6
=
1
4
+
1
8
=
3
11
+
8
11
=
7
8
-
1
4
=
口算：
5
9
×15=
3
5
×2=
1
4
×
4
5
=
1
9
×
3
7
=
7
12
×
3
4
=		 1×
3
20
=
2
5
×
15
4
=
4
17
×34=
8
21
×
7
16
=
1
20
×
2
3
=
5
6
×
2
15
=
15
17
×
17
15
=
口算下面各题．
4
5
÷8=
1
4
×
7
12
=		 5÷
5
8
=		 3+3÷7=
3
20
×15=		 10÷10%= 28×75%=
3
2
×8×
5
9
=

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