用简便运算1.25x49+1.25

用简便运算1.25x49+1.25
2024-11-22 06:44:06
推荐回答(2个)
回答(1):

=1.25*(49+1)
=1.25*50
=62.5

回答(2):

1.25Ⅹ49+1.25

=(1+0.25)Ⅹ49+1.25

=(1+49)×(1.25+0.25)

=50X1.5

=75