同学们去春游,捉迷藏的有39人,捉鱼的有20人,采标本的比捉鱼的多12人,采标本的有多少人?一共有多少人去春游?8k9J8P,{;_/M-A0i(])v5T9[(h,]0O+h;Z:P(e
算式:提示-o2G)z0I5M0J'`8k9J8P,{;_/M-A0i(])v5T9[(h,]0O+h;Z:P(e
答:采标本的有2b'F7s(^2j.{0O人。8k9J8P,{;_/M-A0i(])v5T9[(h,]0O+h;Z:P(e
算式:提示2d:Y1i5D9d8k9J8P,{;_/M-A0i(])v5T9[(h,]0O+h;Z:P(e
答:一共有*r7U7?4q人去春游。8k9J8P,{;_/M-A0i(])v5T9[(h,]0O+h;Z:P(e