题目内容
【题目】2.5÷[(17.2-4.5×3.6)÷0.04]
4.5÷0.25-0.75×1.2
【答案】2.5÷[(17.2-4.5×3.6)÷0.04]
=2.5÷[(17.2-16.2)÷0.04]
=2.5÷[1÷0.04]
=2.5÷25
=0.1
4.5÷0.25-0.75×1.2
=18-0.9
=17.1
【解析】先算括号内的乘法,再算括号内的减法,最后算括号外的,先算称出后算加减。
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题目内容
【题目】2.5÷[(17.2-4.5×3.6)÷0.04]
4.5÷0.25-0.75×1.2
【答案】2.5÷[(17.2-4.5×3.6)÷0.04]
=2.5÷[(17.2-16.2)÷0.04]
=2.5÷[1÷0.04]
=2.5÷25
=0.1
4.5÷0.25-0.75×1.2
=18-0.9
=17.1
【解析】先算括号内的乘法,再算括号内的减法,最后算括号外的,先算称出后算加减。