问题
解答题
脱式计算:(能简算要简算)
|
答案
(1)0.4×5÷0.4×5,
=2÷0.4×5,
=5×5,
=25;
(2)8×25×125×40,
=(8×125)×(25×40),
=1000×1000,
=1000000;
(3)(
+1 4
)-14 15
,14 15
=
+1 4
-14 15
,14 15
=
+(1 4
-14 15
),14 15
=
+0,1 4
=
.1 4