问题 解答题
递等式计算:
(7.5+2.5)×0.25
2.25×1.8+12.5×0.18
[1-(
1
2
+
1
3
)]×36.
答案

(1)(7.5+2.5)×0.25

=10×0.25

=2.5;

(2)2.25×1.8+12.5×0.18

=2.25×1.8+1.25×1.8

=(2.25+1.25)×1.8

=3.5×1.8

=6.3;

(3)[1-(

1
2
+
1
3
)]×36

=[1-

5
6
]×36

=

1
6
×36

=6.

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