脱式计算. 0.25×45+2.

脱式计算.0.25×45+2.5%9.6-11÷7+17×4325+75×25÷37....
2026年09月24日 12:22
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网友(1):

(1)0.25×
4
5
+2.5%,
=
1
5
+2.5%,
=0.2+0.025,
=0.225;

(2)9.6-11÷7+
1
7
×4,
=9.6-11×
1
7
+
1
7
×4,
=9.6-(11×
1
7
-
1
7
×4),
=9.6-[
1
7
×(11-4)],
=9.6-
1
7
×7,
=9.6-1,
=8.6;
(3)325+75×
2
5
÷
3
7
,
=325+30÷
3
7
,
=325+70,
=395.