问题
解答题
看谁最细心.
90÷9-(6+1)
900÷[9-(6+1)]
60-[5×48÷16)]
24×[32-(24-2)].
答案
90÷9-(6+1),
=90÷9-7,
=10-7,
=3;
900÷[9-(6+1)],
=900÷[9-7],
=900÷2,
=450;
60-[5×48÷16)],
=60-[5×3],
=60-15,
=45;
24×[32-(24-2)].
=24×[32-22],
=24×10,
=240.