问题 解答题
口算.
236+500=
330+107=700+200=130+130=63+8=
50×6=19×3=3×9+9=150×6=170×3=
9÷4=300×3-100=1-
1
6
=
5
8
+
3
8
=
7
12
-
4
12
=
1-
1
7
-
4
7
=
答案

236+500=736,330+107=437,700+200=900,130+130=260,63+8=71,
50×6=300,19×3=57,3×9+9=36,150×6=900,170×3=510,
9÷4=2…1,300×3-100=800,1-
1
6
=
5
6
5
8
+
3
8
=1,
7
12
-
4
12
=
1
4
1-
1
7
-
4
7
=
2
7

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