正确计算.(1)0.008×0.000125+0.0125÷0.04=______(2)1-12-120-1200-12000=______.-数学

题目简介

正确计算.(1)0.008×0.000125+0.0125÷0.04=______(2)1-12-120-1200-12000=______.-数学

题目详情

正确计算.
(1)0.008×0.000125+0.0125÷0.04=______
(2)1-
1
2
-
1
20
-
1
200
-
1
2000
=______.
题型:填空题难度:中档来源:不详

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-class="stub"1
2
-class="stub"1
20
-class="stub"1
200
-class="stub"1
2000

=1-(class="stub"1
2
+class="stub"1
20
+class="stub"1
200
+class="stub"1
2000
),
=1-(class="stub"1000
2000
+class="stub"100
2000
+class="stub"10
2000
+class="stub"1
2000
),
=1-class="stub"1111
2000

=class="stub"889
2000

故答案为:0.312501,class="stub"889
2000

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