用简便方法计算29/5--(19/5+5/7）7/4×1/3+1/3+1/3×1/42.81+8/3--0.81+4/34/9×1/3+5/9÷3

用简便方法计算29/5--(19/5+5/7）7/4×1/3+1/3+1/3×1/42.81+8/3--0.81+4/34/9×1/3+5/9÷3
用简便方法计算
29/5--(19/5+5/7）
7/4×1/3+1/3+1/3×1/4
2.81+8/3--0.81+4/3
4/9×1/3+5/9÷3

用简便方法计算29/5--(19/5+5/7）7/4×1/3+1/3+1/3×1/42.81+8/3--0.81+4/34/9×1/3+5/9÷3
29/5--(19/5+5/7）
=29/5-19/5-5/7
=2-5/7
=9/7;
7/4×1/3+1/3+1/3×1/4
=1/3×(7/4+1+1/4)
=1/3×3
=1;
2.81+8/3--0.81+4/3
=2.81-0.81+8/3+4/3
=2+4
=6;
4/9×1/3+5/9÷3
=1/3×(4/9+5/9)
=1/3×1
=1/3;