脱式计算50×18×2÷(12+18)
解题思路:四则运算规则(按顺序计算、先算乘除后算加减,有括号先算括号,有乘方先算乘方)即脱式运算(递等式计算)需在该原则前提下进行
解题过程:
50×18×2÷(12+18)
=50×18×2÷30
=900×2÷30
=1800÷30
=60
存疑请追问,满意请采纳
50×18×2÷(12+18)
=
=50×18×2÷30
=900×2÷30
=1800÷30
=60
50x18x2÷(12+18)
=10x180÷30
=10x6
=60