问题
解答题
|
答案
(1)5.61-
+4.39-12 5
,3 5
=5.61+4.39-
-12 5
,3 5
=(5.61+4.39)-(
+12 5
),3 5
=10-2,
=8;
(2)
÷[1-(4 15
+1 5
)],1 3
=
÷[1-4 15
],8 15
=
÷4 15
,7 15
=
×4 15
,15 7
=
;4 7
(3)(
×5 7
+7 24
÷1 9
)×6,4 9
=(
+5 24
)×6,1 4
=
×6,11 24
=
;11 4
(4)
×5 8
+14 15
÷15,5 8
=
×5 8
+14 15
×5 8
,1 15
=
×(5 8
+14 15
),1 15
=
×1,5 8
=
.5 8