(1)设面粉花掉的钱数是x元,则大米花掉的钱数就是4x元,根据题意可得方程:
x+4x=254,
5x=254,
x=50.8,
则大米花掉的钱数是50.8×4=203.2(元),
答:面粉是50.8元,大米是203.2元.
(2)设成人有x人,则儿童就是5x人,根据题意可得方程:
5x-x=180,
4x=180,
x=45,
45×5=225(人),
答:儿童有225人,成人有45人.
(1)设面粉花掉的钱数是x元,则大米花掉的钱数就是4x元,根据题意可得方程:
x+4x=254,
5x=254,
x=50.8,
则大米花掉的钱数是50.8×4=203.2(元),
答:面粉是50.8元,大米是203.2元.
(2)设成人有x人,则儿童就是5x人,根据题意可得方程:
5x-x=180,
4x=180,
x=45,
45×5=225(人),
答:儿童有225人,成人有45人.