1除以括号30分之1加20分之1括号。用方程计算。

2024-12-26 17:20:28
推荐回答(2个)
回答1:

1 ÷ ( 1/30 + 1/20)
= 1 ÷ (2+3)/60
=1 ÷ 1/12
=1× 12
=12

回答2:

1÷(1/30+1/20)
=1÷5/60
=1÷1/12
=1×12
=12