问题 解答题
请写出过程
①99×99+99
②10×0.1×100③8÷8÷0.125④37×39-29×37
⑤1.8÷2.7÷0.6×2.7⑥47×99⑦0.5+[
5
6
÷(0.15+
9
20
)]
⑧[(
3
20
+2.1)×
4
7
]÷0.9.
答案

①99×99+99,

=99×(99+1),

=99×100,

=9900;

②10×0.1×100,

=1×100,

=100;

③8÷8÷0.125,

=8÷(8×0.125),

=8÷1,

=8;

④37×39-29×37,

=37×(39-29),

=37×10,

=370;

⑤1.8÷2.7÷0.6×2.7,

=1.8÷0.6,

=3;

⑥47×99,

=47×(100-1),

=47×100-47,

=4700-47,

=4653;

⑦0.5+[

5
6
÷(0.15+
9
20
)],

=0.5+[

5
6
÷(0.15+0.45)],

=0.5+(

5
6
÷
3
5
),

=

9
18
+
25
18

=

34
18

=

17
9

⑧[(

3
20
+2.1)×
4
7
]÷0.9,

=(

3
20
×
4
7
+2.1×
4
7
÷
9
10

=(

3
35
+
6
5
)×
10
9

=

3
35
×
10
9
+
6
5
×
10
9

=

2
21
+
4
3

=

10
7

=1

3
7

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