问题
解答题
用脱式计算下面各题(能简算的要简算).
|
答案
①(
+1 12
)×24,1 8
=
×24+1 12
×24,1 8
=2+3,
=5;
②
×99+0.75,3 4
=0.75×99+0.75,
=0.75×(99+1),
=0.75×100,
=75;
③2-
÷6 13
-9 26
,2 3
=2-1
-1 3
,2 3
=2-(1
+1 3
),2 3
=2-2,
=0;
④
÷[5 8
+(1 3
-5 6
)],3 4
=
÷[5 8
+1 3
],1 12
=
÷5 8
,5 12
=1.5.