Question

0.7×1又9分之4+2又4分之3×（-14）+0.7×9分之5+4分之1×（-14）要过程

Answer 1

0.7×1又9分之4+2又4分之3×（-14）+0.7×9分之5+4分之1×（-14）
=(0.7×1又9分之4+0.7×9分之5)+[2又4分之3×（-14）+4分之1×（-14）]
=[0.7×(1又9分之4+9分之5)] + [(2又4分之3+4分之1)×（-14）]
=(0.7×2)+[3×（-14）]
=1.4+(-42)
=-40.6

追问

0.7×19又9分之4+2又4分之3×（-14）+0.7×9分之5+4分之1×（-14）要过程

追答

0.7×19又9分之4+2又4分之3×（-14）+0.7×9分之5+4分之1×（-14）
=(0.7×19又9分之4+0.7×9分之5)+[2又4分之3×（-14）+4分之1×（-14）]
=[0.7×(19又9分之4+9分之5)] + [(2又4分之3+4分之1)×（-14）]
=(0.7×20)+[3×（-14）]
=14+(-42)
=-28

Answer 2

0.7×1又9分之4+2又4分之3×（-14）+0.7×9分之5+4分之1×（-14）
=(0.7×1又9分之4+0.7×9分之5)+[2又4分之3×（-14）+4分之1×（-14）]
=（0.7×1又9分之4+0.7×9分之5)+[2又4分之3×-14+4分之1×-14]
=（0.9×4）+[3×（-14）
=3.6+（-42）
=45.6

追问

0.7×19又9分之4+2又4分之3×（-14）+0.7×9分之5+4分之1×（-14）要过程

Answer 3

=0.7(1 又4/9+5/9)+(-14)(2又 3/4+1/4）
=0.7*2+（-14）*3
=-40.6
=-28和45.6是错的.