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口算:120×23=56×215=1517×1715=34×15=611×112=322×1113=1315×30=28×724=47×38×716=914÷3=38+516=47+78=

题目详情
口算:
1
20
×
2
3
=
5
6
×
2
15
=
15
17
×
17
15
=
3
4
×
1
5
=
6
11
×
1
12
=
3
22
×
11
13
=
 
13
15
×30=
28×
7
24
=
4
7
×
3
8
×
7
16
=
9
14
÷3=
3
8
+
5
16
=
4
7
+
7
8
=
▼优质解答
答案和解析
1
20
×
2
3
=
1
30
5
6
×
2
15
=
1
9
15
17
×
17
15
=1
3
4
×
1
5
=
3
20
6
11
×
1
12
=
1
22
3
22
×
11
13
=
3
26
 
13
15
×30=26
28×
7
24
=
49
6
4
7
×
3
8
×
7
16
=
3
32
9
14
÷3=
3
14
3
8
+
5
16
=
11
16
4
7
+
7
8
=
81
56