题目内容

用递等式计算.
60-25×4.5×0.4
3×(150-1530÷15)
8
9
÷[(
2
5
+
1
10
)×
3
4
].
60-25×4.5×0.4,
=60-25×0.4×4.5,
=60-10×4.5,
=60-45,
=15.
3×(150-1530÷15),
=3×(150-102),
=3×48,
=144.
8
9
÷[(
2
5
+
1
10
)×
3
4
],
=
8
9
÷[(
4
10
+
1
10
)×
3
4
],
=
8
9
÷[
1
2
×
3
4
],
=
8
9
÷
3
8

=
8
9
×
8
3

=
64
27
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网