题目内容

简便计算:
(1)24.87-0.53-1.47
(2)50×(
3
10
+
2
5
-
6
25
)

(3)0.375×
15
2
+
3
8
-
1
2
÷
8
3
(1)24.87-0.53-1.47,
=24.87-(0.53+1.47),
=24.87-2,
=22.87;

(2)50×(
3
10
+
2
5
-
6
25
)

=50×
3
10
+
2
5
×50-50×
6
25

=15+20-12,
=35-12,
=23;

(3)0.375×
15
2
+
3
8
-
1
2
÷
8
3

=
3
8
×
15
2
+
3
8
-
1
2
×
3
8

=(
15
2
+1-
1
2
)×
3
8

=8×
3
8

=3.
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