试题与答案

口算.314×7=37×37=310×6=916×83=18×3×89=14+3

题型:解答题

题目:

口算.
3
14
×7
=
3
7
×
3
7
=
3
10
×6
=
9
16
×
8
3
=
1
8
×3×
8
9
=
1
4
+
3
4
×
1
3
=
1
2
3
×
3
5
=
7
15
×10
=

答案:

3
14
×7=
3
2
;②
3
7
×
3
7
=
9
49
;③
3
10
×6
=
9
5
; ④
9
16
×
8
3
=
3
2

1
8
×3×
8
9
=
1
3
,⑥
1
4
+
3
4
×
1
3
=
1
2
; ⑦1
2
3
×
3
5
=1; ⑧
7
15
×10
=
14
3

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