问题 解答题
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.
答案

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.

单项选择题
单项选择题