题目内容

计算
(了)了800-了3t0÷了8×了
(五)(了-了%×70)÷
7

(3)
了9
了3
÷
7
t
-
了3
×
t
7

(0)
8
了3
÷7+
7
×
了3

(t)
7
9
×9+
7
9

(了)五-
了3
÷
9
五了
-
3
(1)1800-1a20÷18×6,
=1800-72×6,
=1800-人20,
=1a20;
(2)(1-1%×70)÷
2
7

=(1-70%)÷
2
7

=
a
10
×
7
2

=
21
20

(a)
19
1a
÷
7
2
-
6
1a
×
2
7

=(
19
1a
-
6
1a
)×
2
7

=
2
7

(人)
8
1a
÷7+
1
7
×
6
1a

=(
8
1a
+
6
1a
)×
1
7

=
1人
1a
×
1
7

=
2
1a

(2)
7
9
×9+
7
9

=(9+1)×
7
9

=
70
9

(6)2-
6
1a
÷
9
26
-
2
a

=2-
6
1a
×
26
9
-
2
a

=2-(
a
+
2
a
),
=0.
故答案为:(1)1a20(2)
21
20
(a)
2
7
(人)
2
1a
(2)
70
9
(6)0.
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