题目内容

脱式计算
①2700×(506-499)÷900
②[1
1
8
+(0.65+
7
20
1
7
]×4.8.
①2700×(506-499)÷900
=2700÷900×7,
=3×7,
=21;

②[1
1
8
+(0.65+
7
20
1
7
]×4.8,
=[1
1
8
+1÷
1
7
]×4.8,
=(1
1
8
+7)×4.8,
=
65
8
×4.8,
=39.
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