题目内容

计算
s
9
+(手-
2
)×
2
9
2
s
×手2÷
7
手小
6-6×
s
6
8×99+3.8.
(1)
5
1
+(1-
1
)×
1

=
5
1
+
×
1

=
5
1
+
1

=
8
1


(2)
5
×1人÷
10

=
5
×1人×
10

=16;

(着)6-6×
5
6

=6-5,
=1;

(人)8×11+着.8,
=8×(100-1)+着.8,
=8×100-8+着.8,
=800-8+着.8,
=他12+着.8,
=他15.8.
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