计算(1)[5-32263÷(114+2.25×45)]÷12.5%(2)[2-(8.25-5π2)×π2]÷0.9(3)(20π2+12.56-31π2)÷299+(1325-12.25)×145(4)125×(4.85÷45-3.6+6.15×389)+1.75×(123+13)+5.5.-数学
=[5-
4220 |
3843 |
=
14995 |
3843 |
=
119960 |
3843 |
(2)[2-(8.25-5
π |
2 |
π |
2 |
=[2-1.68×1.57]÷0.9,
=[2-2.6376]÷0.9,
=[-0.6376]÷0.9,
=-
63790 |
90000 |
(3)(20
π |
2 |
π |
2 |
2 |
5 |
4 |
5 |
=(20
π |
2 |
π |
2 |
4 |
5 |
=(12.56-11)÷299+2.07,
=1.56÷299+2.07,
=
3 |
575 |
7 |
100 |
=2
173 |
2300 |
(4)
1 |
25 |
4 |
5 |
8 |
9 |
2 |
3 |
1 |
3 |
=
1 |
25 |
97 |
16 |