在正方形鱼塘四周种上树，四个顶点都种一棵树，这样每边都有22棵树，四周共种多少棵树？+y7?6Z2S.}3i/^(d-o
22×4-4=84（棵）+y7?6Z2S.}3i/^(d-o
答：四周共种8v:_2[0S)O棵树。+y7?6Z2S.}3i/^(d-o