急！小学简算题

14.8*6.3 + 46.5*4.5 + 8.3*3.7 + 0.465*550 - 6.3*6.5
= [46.5*4.5 + 46.5*5.50] + 6.3*[14.8 - 6.5] + 8.3*3.7
= 46.5*10 + 6.3*8.3 + 8.3*3.7
= 465 + 8.3*[6.3 + 3.7]
= 465 + 8.3*10
= 465 + 83
= 548

8425258.5

先化简14.8*6.3-6.3*6.5=8.3*6.5
再化简46.5*4.5+0.465*550=46.5*10
然后化简6.5*8.3+8.3*3.7=8.3*10.2
别的都死算

(14.8-6.5)*6.3+46.5*4.5+8.3*3.7+0.465*550=8.3*6.3+46.5*4.5+8.3*3.7+0.465*550=8.3*(6.3+3.7)+46.5*4.5+0.465*550=83+46.5*4.5+46.5*5.5=83+46.5*(4.5+5.5)=83+46.5*10=83+465=1295

=548

6.3*(14.8-6.5)+4.65*(4.5*10+550/10)+8.3*3.7
=6.3*8.3+4.65*100+8.3*3.7
=8.3*(6.3+3.7)+4.65*100
=83+465
=548