动物园有4只，15只，7只，.m3I-h9V7d)k0I
（1）比少几只？.m3I-h9V7d)k0I
算式：提示8A0Y'{5y0B4\2c'N(d;E0d({:e/Z6B'@8V.m3I-h9V7d)k0I
答：比少(P:h)y0R8u)Y,N9C4e7z;v9n只。.m3I-h9V7d)k0I
（2）再来几只就和一样多？.m3I-h9V7d)k0I
算式：提示0h(X.^3e/l4n2j)^/b;H(y8Z(b8C5o.m3I-h9V7d)k0I
答：再来*s.u+L4`/h+?+D'K6Y1{只就和一样多。.m3I-h9V7d)k0I
（3）和一共有多少只？.m3I-h9V7d)k0I
算式：提示.n9K:~.j9S'I.m3I-h9V7d)k0I
答：和一共有8R1A2G0V:p)B)S.m)u2A6@(E只。.m3I-h9V7d)k0I