89×91-59눀计算?

2024-11-24 07:35:04
推荐回答(4个)
回答1:

89×91-59²
=(90-1)×(90+1)-59²
=90²-59²-1²
=(90+59)×(90-59)-1
=149×31-1
=149×30+149×1-1
=150×30-1×30+148
=4500+118
=4618

回答2:

=5498,给个好评呗,好心有好报

回答3:

4618..

回答4:

89×91-59²
=(90-1)x(90+1)-59²
=90²-1-59²
=(90+59)x(90-59)-1
=149x31-1
=4619-1
=4618