0.36-0.36×0.5=0.36×(1-0.5)=0.36×0.5=0.36÷2×(0.5×2)=0.18供参考,有疑问请追问
0.36-0.6✘0.6✘0.5
0.36(1-0.5)
0.36×(1-0.5)=0.36×0.5=0.18