1-65%= 1-1÷6= 0.32= 40×5%=
1
4
+
1
5
=
25%÷
1
4
=
1-
4
9
+
5
9
=
0.125×0.125=
分析:1-65%,40×5%先把百分?jǐn)?shù)化成小數(shù)再計算;0.32=0.3×0.3由此求解;25%÷
1
4
把百分?jǐn)?shù)化成分?jǐn)?shù)再計算;1-
4
9
+
5
9
按照從左到右的順序計算;0.125×0.125注意小數(shù)的位數(shù).
解答:解:
1-65%=0.35, 1-1÷6=
5
6
0.32=0.09, 40×5%=2,
1
4
+
1
5
=
9
20
,
25%÷
1
4
=1,
1-
4
9
+
5
9
=
10
9
0.125×0.125=0.015625.
點(diǎn)評:本題考查了基本的計算,計算時要細(xì)心,注意小數(shù)的位數(shù),結(jié)果用分?jǐn)?shù)表示的要把結(jié)果化成最簡分?jǐn)?shù).
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