48*47分之3*3分之1简便算法

(1+4分之3)÷(1-4分之1)
=(1+3/4)÷(1-1/4)
=7/4÷3/4
=7/4×4/3
=7/3
=2又1/3
95×47分之3
=95×3/47
=(94+1)×3/47
=94×3/47+1×3/47
=6+3/47
=6又3/47
11分之3÷[5分之2+(1-11分之10)]
=3/11÷[2/5+(1-10/11)]
=3/11÷(2/5-1/11)
=3/11÷(22/55-5/55)
=3/11÷17/55
=3/11×55/17
=15/17

3.72*40%+28*2/5=72*40%+28*40%=(72+28)*40=40 4.(1/12+3/47)*12=12*1/12+3*12/47=1又36/47