Question

55×45-55+55×56递等式怎么算？

Answer 1

55×45-55+55×56
=55×(45-1+56)
=55×100
=5500
望采纳，谢谢

Answer 2

55×45-55+55×56 =55×(45-1+56)=55×100 =5500 望采纳，谢谢

Answer 3

45×55-55+56×55
=55×（45-1+56）
=55×100
=5500