题目内容

脱式计算,能简算的要简算
5.125×
1
4
+2.875÷4
1.25×32×2.5×75
9
10
-
5
8
-
1
8

48-(32÷
8
3
-
12
5
).
(1)5.125×
1
4
+2.875÷4
=(5.125+2.875)×
1
4

=8×
1
4

=2;

(2)1.25×32×2.5×75
=(1.25×8)×(4×2.5)×75
=10×10×75
=7500;

(3)
9
10
-
5
8
-
1
8

=
9
10
-(
5
8
+
1
8

=
9
10
-
3
4

=
3
20


(4)48-(32÷
8
3
-
12
5

=48-(12-
12
5

=48-9.6
=38.4.
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