题目内容

计算.
(1)22.7-1.8+17.3-18.2
(2)3899+3737÷37
(3)385×6÷385×6
(4)
4
15
+
2
5
×(
5
6
-
2
3
)

(5)32×125%×
1
4

(6)38.4×13+30.8×26.
(1)22.7-1.8+17.3-18.2,
=(22.7+17.3)-(1.8+18.2),
=40-20,
=20;

(2)3899+3737÷37,
=3899+101,
=4000;

(3)385×6÷385×6,
=(385÷385)×(6×6),
=1×36,
=36;

(4)
4
15
+
2
5
×(
5
6
-
2
3
)

=
4
15
+
2
5
×
1
6

=
4
15
+
1
15

=
1
3


(5)32×125%×
1
4

=8×4×1.25×
1
4

=(8×1.25)×(4×
1
4
),
=10×1,
=10;

(6)38.4×13+30.8×26,
=38.4×13+61.6×13,
=(38.4+61.6)×13,
=100×13,
=1300.
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