解题思路:抓住等式的定义,将式子的左边利用添括号的方法改变运算顺序,从而使等式成立.
(6+36)÷3-2×4-1,
=42÷3-2×4-1,
=14-8-1
=5;
6+36÷(3-2)×4-1,
=6+36÷1×4-1,
=6+36×4-1,
=6+144-1,
=149;
(6+36÷3-2)×4-1,
=(6+12-2)×4-1,
=16×4-1,
=64-1,
=63;
故答案为:
(6+36)÷3-2×4-1=5;
6+36÷(3-2)×4-1=149;
(6+36÷3-2)×4-1=63.
点评:
本题考点: 凑数谜.
考点点评: 此题考查了利用小括号在混合运算中改变运算顺序的方法.