下面各题怎样算简便就怎样算57×16-2÷751213×(52-13)[6.85-(0.65+0.7)]÷2.5(37+35)×7+45.-数学
题文
下面各题怎样算简便就怎样算
[6.85-(0.65+0.7)]÷2.5 (
|
答案
(1)
=
=(16-2)×
=14×
=10; (2)
=
=
=2; (3)[6.85-(0.65+0.7)]÷2.5, =[6.85-1.35]÷2.5, =5.5÷2.5, =2.2; (4)(
=
|
题文
下面各题怎样算简便就怎样算
[6.85-(0.65+0.7)]÷2.5 (
|
答案
(1)
=
=(16-2)×
=14×
=10; (2)
=
=
=2; (3)[6.85-(0.65+0.7)]÷2.5, =[6.85-1.35]÷2.5, =5.5÷2.5, =2.2; (4)(
=
|