问题
解答题
脱式计算
|
答案
(1)(
+4 5
)÷1 4
+7 3
,7 10
=
×21 20
+3 7
,7 10
=
+9 20
,7 10
=
;23 20
(2)9÷[1-(
+1 2
)],1 6
=9÷[1-
],2 3
=9÷
,1 3
=27;
(3)1.02÷(5+0.4×0.25),
=1.02÷(5+0.1),
=1.02÷5.1,
=0.2.
脱式计算
|
(1)(
+4 5
)÷1 4
+7 3
,7 10
=
×21 20
+3 7
,7 10
=
+9 20
,7 10
=
;23 20
(2)9÷[1-(
+1 2
)],1 6
=9÷[1-
],2 3
=9÷
,1 3
=27;
(3)1.02÷(5+0.4×0.25),
=1.02÷(5+0.1),
=1.02÷5.1,
=0.2.