1、-3/5×(-3-1/2)÷(-1-1/4)÷3
=-3/5×(-7/2)÷(-5/4)÷3
=-3/5×(-7/2)×(-4/5)×1/3
=-14/25
2、=23/42×(-42/5)
=-23/5
3、=-5-1/2×(-1/6)×3/11×4/3
=-5+1/33
=-4又32/33
4、=4-4-1/4×100
=-25
1、-3/5×(-3-1/2)÷(-1-1/4)÷3
=-3/5×(-7/2)÷(-5/4)÷3
=-3/5×(-7/2)×(-4/5)×1/3
=-14/25
2、=23/42×(-42/5)
=-23/5
3、=-5-1/2×(-1/6)×3/11×4/3
=-5+1/33
=-4又32/33
4、=4-4-1/4×100
=-25