橡皮长厘米 |
橡皮长厘米 |
45-726+13 46+837+9 45+968-13
41-3= |
20+37= |
59-3= |
25+10+7= |
5+42= |
27+8= |
30+22= |
30+(28-20)= |
93-60= |
40-9= |
64-30= |
56-(32+8)= |