题目内容

计算下列各题.
①36×202-72
②608×99+608
③75×60%+24×
3
5
+0.6
[4
1
3
+(2.2-1
7
15
5
22
]÷4.5

⑤14.85-1.58×8+31.2÷1.2.
①36×202-72,
=36×202-36×2,
=(202-2)×36,
=200×36,
=7200;

②608×99+608,
=608×(99+1),
=608×100,
=60800;

③75×60%+24×
3
5
+0.6,
=75×0.6+24×0.6+0.6,
=(75+24+1)×0.6,
=100×0.6,
=60;

④[4
1
3
+(2.2-1
7
15
)×
5
22
]÷4.5,
=[4
1
3
+(2
1
5
-1
7
15
)×
5
22
]÷4
1
2

=[4
1
3
+
11
15
×
5
22
]÷4
1
2

=[4
1
3
+
1
6
2
9

=
27
6
×
2
9

=1;

⑤14.85-1.58×8+31.2÷1.2,
=14.85-12.64+26,
=2.21+26,
=28.21.
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