3分之2乘17加3分之2除12分之1加3分之2

问题描述:

3分之2乘17加3分之2除12分之1加3分之2

2/3×17+2/3÷1/12+2/3
=2/3×17+2/3×12+2/3
=2/3×(17+12+1)
=2/3×30
=20