题目内容

怎样计算简便就怎样计算.
①1598-490÷18×36
②3.2×8×1.25×
3
16

③9.6÷1.25+5.4×
4
5

1
3
+
8
15
×(
5
6
-0.625)
①1598-490÷18×36,
=1598-490×(36÷18),
=1598-490×2,
=1598-980,
=618;

②3.2×8×1.25×
3
16

=(3.2×1.25)×(8×
3
16
),
=4×
3
2

=6;

③9.6÷1.25+5.4×
4
5

=(9.6+5.4)×
4
5

=15×
4
5

=12;

1
3
+
8
15
×(
5
6
-0.625),
=
1
3
+
8
15
×
15
24

=
1
3
+
1
3

=
2
3
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