题目内容

计算,能简算的一定要简算.
65.5+65.5×99
5
8
×[1÷(
3
4
+
1
3
)]

2
5
÷
3
4
÷
1
15

2.25×1.8+12.5×0.18
2
3
×
2
3
÷2.
(1)65.5+65.5×99,
=65.5×(99+1),
=65.5×100,
=6550;

(2)
5
8
×[1÷(
3
4
+
1
3
)],
=
5
8
×[1÷
13
12
],
=
5
8
×
12
13

=
15
26


(3)
2
5
÷
3
4
÷
1
15

=
2
5
×
4
3
×15,
=8;

(4)2.25×1.8+12.5×0.18,
=22.5×0.18+12.5×0.18,
=(22.5+12.5)×0.18,
=35×0.18,
=6.3;

(5)2÷
2
3
×
2
3
÷2,
=2×
3
2
×
2
3
×
1
2

=1.
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