(台)
14 - 7 =
15 - 9 =
16 - 8 =
31 - 5 =
20 + 40 =
85 - 5 =
44 + 7 =
93-90=
15-7+3=
8+(90-50)=
47+30+20=
20+5= 34+30= 46-8= 70+23=
56-8= 56+4= 20+40= 37+8=
38+6= 100-40= 95+5= 90- 9=
34- 8= 46+40= 20+80= 47+7=
76-6+20= 98-90+6= 26-6+9= 25+5-7=
38- 27+14= 56-6+14= 63- 40+7= 49+7-20=
答:_________。
原有
15个
14副
12副
卖出
9个
( )副
5副
还剩
( )个
7副
12->7 14->6
11->2 13->4