问题
解答题
计算并验算:
(1)492+698=
(2)505-387=
(3)400-239=
答案
(1)492+698=1190;
验算:
(2)505-387=118;
验算:
(3)400-239=161;
验算:
.
计算并验算:
(1)492+698=
(2)505-387=
(3)400-239=
(1)492+698=1190;
验算:
(2)505-387=118;
验算:
(3)400-239=161;
验算:
.