问题
解答题
怎样简便就怎样算.
|
答案
(1)6÷
-3 10
÷6,3 10
=20-
,1 20
=19
;19 20
(2)
×3 4
-5 7
×3 4
,1 7
=(
-5 7
)×1 7
,3 4
=
×4 7
,3 4
=
;3 7
(3)2-
-5 11
,6 11
=2-(
+5 11
),6 11
=2-1,
=1;
(4)(
+1 3
+1 4
)×60,1 5
=
×60+1 3
×60+1 4
×60,1 5
=20+15+12,
=47.