Question

1.25*(8+4)*2.5简便计算

急！！！！！！！明天要交，我会给悬赏的

Answer 1

=1.25×12×2.5
=1.25×3×4×2.5
=3.75×10
=37.5

Answer 2

1.25× ( 8+4 )x 2.5
=(1.25×8)+( 2.5×4)
= 10+ 10
=20

Answer 3

原式=1.25×3×（4×2.5）
=3.75×10
=37.5