74+397=74+400-3=474-3=471
=74+400-3=474-3=471
收到了吗?
三分之一x74十74÷3怎么简便运算 1/3x74十74÷3 =74÷3十74÷3 =(74+74)÷3 =148÷3 =148/3 =49又1/3