题目内容

简算
950÷25
72×12.5×
1
9
7
8
-
7
18
+
1
8
-
5
18
18.5×72+1.85×280.
(1)950÷25,
=(950×4)÷(25×4),
=3800÷100,
=38;

(2)72×12.5×
1
9

=72×
1
9
×12.5,
=8×12.5,
=100;

(3)
7
8
-
7
18
+
1
8
-
5
18

=(
7
8
+
1
8
)-(
7
18
+
5
18
),
=1-
2
3

=
1
3


(4)18.5×72+1.85×280,
=18.5×72+18.5×28,
=18.5×(72+28),
=18.5×100,
=1850.
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