蘑菇头小姑娘
幼苗
共回答了9个问题采纳率:100% 举报
(1)45×56-44+45×44
=45×56+45×44-44
=45*(56+44)-44
=45*100-44
=4500-44
=4456
(2)8分之1÷(3-13分之5-13分之18)
=(1/8) /(3-5/13-18/13)
=(1/8)/《3-(5/13 +18/13)》
=(1/8)/(3-23/13)
=(1/8)/ (39-23)/13
=(1/8)/16/13
=13/(8*16)
=13/128
(3)(4分之3-15分之1×9)÷5分
=(3/4 -9/15)/5
=(45/60 -36/60)/5
=9/60 /5
=3/100
=0.03
1年前
8