题目内容

简便运算.
198-(98+37)
7
4
×12.5×
5
7
×8
7
16
×40-
5
16
÷
1
40
(1)198-(98+37 )
=198-98-37,
=100-37,
=63;

(3)
7
4
×12.5×
5
7
×8
=(
7
4
×
5
7
)×(12.5×8),
=
5
4
×
100,
=125;

7
16
×40-
5
16
÷
1
40

=
7
16
×40-
5
16
×
40,
=(
7
16
-
5
16
)×40,
=
1
8
×40,
=5.
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