括号六分之五十三减10.5乘以五分之四括号处以三分之十三
=(9-1/6 - 42/5) * (3/13)
=(9-1/6 - 8 - 2/5) * (3/13)
=(5/6 - 2/5) * (3/13)
=(13/30) * (3/13)
=1/10
括号六分之五十三减10.5乘以五分之四括号处以三分之十三
=(9-1/6 - 42/5) * (3/13)
=(9-1/6 - 8 - 2/5) * (3/13)
=(5/6 - 2/5) * (3/13)
=(13/30) * (3/13)
=1/10