24除7/12-24乘以5/7=?62除〈3/8+2/5〉乘1/4=?〈2-1/2〉除〈11/12-3/4〉=?乘36=?

1、=24×12/7-24×5/7=24×(12/7-5/7)=24
2、=62÷(15+16)/40×1/4=62×40/31×1/4=20
3、=3/2÷(11-9)/12=3/2×6=9
4、=1/4×36+1/6×36=9+6=15