试题:
看谁口算又对又快.
230+680=
300×6=360+70=0×189=
56÷7=350-260=12×6=160×4=
0÷9=
1
5
+
4
5
=
1
9
+
1
9
=
1-
7
8
=

答案:

我来补答

230+680=910300×6=1800360+70=4300×189=0
56÷7=8350-260=9012×6=72160×4=640
0÷9=0
1
5
+
4
5
=1
1
9
+
1
9
=
2
9
1-
7
8
=
1
8
故答案为:910,1800,430,0,8,90,72,640,0,1,
2
9
1
8
 
 
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