问题
填空题
正确计算. (1)0.008×0.000125+0.0125÷0.04=______ (2)1-
|
答案
(1)0.008×0.000125+0.0125÷0.04,
=0.008×0.000125+0.000125×100÷0.04,
=0.000125×(0.008+100÷0.04),
=0.000125×(0.008+2500),
=0.000125×2500.008,
=0.312501;
(2)1-
-1 2
-1 20
-1 200
,1 2000
=1-(
+1 2
+1 20
+1 200
),1 2000
=1-(
+1000 2000
+100 2000
+10 2000
),1 2000
=1-
,1111 2000
=
.889 2000
故答案为:0.312501,
.889 2000