72.5ⅹ4.5-7.25Ⅹ25简便计算?

2025-06-22 15:36:51
推荐回答(3个)
回答1:

72.5×4.5-7.25×25
=72.5×4.5-72.5×2.5
=72.5×(4.5-2.5)
=72.5×2
=145

回答2:

=7.25×10×4.5-7.25×25
=7.25×45-7.25×25
=7.25×(45-25)
=7.25×20
=7.25×10×2
=72.5×2
=145

回答3:

原式=7.25*45-7.25*25
=7.25*(45-25)
=7.25*20
=145