一年级上册口算题大全：20以内连减
2018-02-28 16:04:15
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11-6-5= 6-1-0= 17-7-8= 20-3-6=
12-5-4= 17-6-1= 9-4-4= 16-13-1=
19-7-11= 18-13-4= 20-12-5= 15-2-8=
5-3-0= 1 8-5-8= 16-6-7= 10-1-8=
7-4-3= 13-9-3= 19-4-6= 12-9-1=
