问题
解答题
先按要求给下面的算式添上括号,然后再计算.
(1)先减,再加,最后除.
84-24+12÷6
(2)先加,再除,最后减.
84-24+12÷6.
答案
(1)按先减,再加,最后除的运算顺序,把84-24+12÷6添加括号为:
(84-24+12)÷6,
=(60+12)÷6,
=72÷6,
=12;
(2)按先加,再除,最后减的运算顺序,把84-24+12÷6添加括号为:
84-(24+12)÷6,
=84-36÷6,
=84-6,
=78.