问题
解答题
|
答案
(1)2.5×32×12.5,
=(2.5×4)×(8×12.5),
=10×100,
=1000;
(2)8×5×(
-2 5
),1 8
=40×
-40×2 5
,1 8
=16-5,
=11;
(3)4.63+3
+5.37+74 5
,1 5
=(4.63+5.37)+(3
+74 5
),1 5
=10+11,
=21;
(4)17×
-5 8
,5 8
=(17-1)×
,5 8
=16×
,5 8
=10.