题目内容

递等式计算:
(7.5+2.5)×0.25710-18×45.4÷18+12
8
5
×
25
24
2.25×1.8+12.5×0.18[1-(
1
2
+
1
3
)]×36.
(1)(7.5+2.5)×0.25,
=10×0.25,
=2.5;

(2)710-18×4,
=710-72,
=638;

(3)5.4÷18+12,
=0.3+12,
=12.3;
(4)2÷
8
5
×
25
24

=
5
4
×
25
24

=
125
96


(5)2.25×1.8+12.5×0.18,
=(22.5+12.5)×0.18,
=35×0.18,
=6.3;

(6)[1-(
1
2
+
1
3
)]×36,
=(1-
5
6
)×36,
=
1
6
×36,
=6.
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