题目内容

脱式计算.(能简算的要简算)
0.25×12.5×8

6.4×
2
5
+
2
5
×3.6

[1-(
1
3
-
1
5
)]×
15
26
(1)0.25×12.5×8,
=0.25×(12.5×8),
=0.25×100,
=25;

(2)6.4×
2
5
+
2
5
×3.6,
=(6.4+3.6)×
2
5

=10×
2
5

=4;

(3)[1-(
1
3
-
1
5
)]×
15
26

=[1-
2
15
15
26

=
13
15
×
15
26

=
1
2
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