【题目】混合运算
452-160÷80×116 30×2-120÷60 639÷[540÷(100-40)]
【答案】220;58;71
【解析】
452-160÷80×116
=452-2×116
=452-232
=220
30×2-120÷60
=60-2
=58
639÷[540÷(100-40)]
=639÷(540÷60)
=639÷9
=71

【题目】混合运算
452-160÷80×116 30×2-120÷60 639÷[540÷(100-40)]
【答案】220;58;71
【解析】
452-160÷80×116
=452-2×116
=452-232
=220
30×2-120÷60
=60-2
=58
639÷[540÷(100-40)]
=639÷(540÷60)
=639÷9
=71