题目内容

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.
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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