在下面的数字之间添上运算符号或括号,使等式成立.1______2______3=11______2______3______4=11______2_

2024-12-01 13:14:22
推荐回答(1个)
回答1:

(1)(1+2)÷3,
=3÷3,
=1;
(2)1×2+3-4,
=2+3-4,
=1;
(3)[(1+2)×3-4]÷5,
=[9-4]÷5,
=1;
故答案为:(+),÷;×,+,-;[(+),×,-],÷.