有5个同学投沙包,老师如果发给每人2个沙包就差1个,老师共有多少个沙包?0f'J2](d3V*P+y4\,q-K+y,?+]
算式:提示4X-D8N5w)j+f9y0f'J2](d3V*P+y4\,q-K+y,?+]
口答:老师共有-X)J(@;u2A:K(S3U1R(k;s;f(N;]个沙包。0f'J2](d3V*P+y4\,q-K+y,?+]