能简算的要简算.195÷(1-70%)÷65%0.8×2.7+7.3÷125%(85%÷5+0.83)÷81025%×1331+14×1831.-数学

题文

能简算的要简算.
195÷(1-70%)÷65%
0.8×2.7+7.3÷125%
(85%÷5+0.83)÷
8
10
25%×
13
31
+
1
4
×
18
31
题型:解答题  难度:中档

答案

(1)195÷(1-70%)÷65%
=195÷(1-0.7)÷0.65
=195÷0.3÷0.65
=650÷0.65
=1000;

(2)0.8×2.7+7.3÷125%
=0.8×2.7+7.3÷1.25
=2.16+5.84
=8;

(3)(85%÷5+0.83)÷
8
10

=(0.85÷5+0.83)÷
8
10

=(0.17+0.83)÷
8
10

=1÷
8
10

=1
1
4


(4)25%×
13
31
+
1
4
×
18
31

=
1
4
×
13
31
+
1
4
×
18
31

=
1
4
×(
13
31
+
18
31

=
1
4
×1
=
1
4
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