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口算下面各题.29×35=67×79=58×415=920×521=215×4=215×8=1912×1219=722×227=1.2×35=2.4×56=910÷3=38÷2=

题目详情
口算下面各题.
2
9
×
3
5
=
6
7
×
7
9
=
5
8
×
4
15
=
9
20
×
5
21
=
2
15
×4=
2
15
×8=
19
12
×
12
19
=
7
22
×
22
7
=
1.2×
3
5
=
2.4×
5
6
=
9
10
÷3=
3
8
÷2=
▼优质解答
答案和解析
2
9
×
3
5
=
2
15
6
7
×
7
9
=
2
3
5
8
×
4
15
=
1
6
9
20
×
5
21
=
3
28
2
15
×4=
8
15
2
15
×8=
16
15
19
12
×
12
19
=1
7
22
×
22
7
=1
1.2×
3
5
=
18
25
2.4×
5
6
=2
9
10
÷3=
3
10
3
8
÷2=
3
16