问题
解答题
|
答案
解(1)6.75-(4.2+1.75),
=6.75-1.75-4.2,
=0.8;
(2)3.5×(20.6-16.8÷4.8),
=3.5×(20.6-3.5),
=3.5×17.1,
=59.85;
(3)[
-(3 4
-5 6
)]÷2 3
,5 4
=[
-3 4
]÷1 6
,5 4
=
×7 12
,4 5
=
;7 15
(4)48.38-21.63-8.37,
=48.38-(8.37+21.63),
=48.38-30,
=18.38;
(5)(
-3 2
+2 3
)×12,1 4
=
×12-3 2
×12+2 3
×12,1 4
=18-8+3,
=13;
(6)
÷[3 4
-(5 8
+3 16
)],1 4
=
÷[3 4
-5 8
],7 16
=
÷[3 4
-10 16
],7 16
=
÷3 4
,3 16
=
×3 4
,16 3
=4.