早教吧 育儿知识 作业答案 考试题库 百科 知识分享

899999+89999+8999+899+89199819981999÷1998999+999×99935×25+0.6+35×352222×29100+6666×0.09-3333×0.04

题目详情
899999+89999+8999+899+89           1998
1998
1999
÷1998
999+999×999                     
3
5
×
2
5
+0.6+
3
5
×
3
5
2222×
29
100
+6666×0.09-3333×0.04
▼优质解答
答案和解析
①899999+89999+8999+899+89,
=(900000-1)+(90000-1)+(9000-1)+(900-1),
=999900-4,
=999896;

②1998
1998
1999
÷1998,
=(1998+
1998
1999
)÷1998,
=1+
1
1999

=1
1
1999


③999+999×999,
=999×(1+999),
=999×1000,
=999000;

3
5
×
2
5
+0.6+
3
5
×
3
5

=
3
5
×(
2
5
+1+
3
5
),
=
3
5
×2,
=
6
5


⑤2222×
29
100
+6666×0.09-3333×0.04,
=1111×(0.29×2+0.09×6-0.04×3),
=1111×(0.58+0.54-0.12),
=1111×1,
=1111.