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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
| ||||||||
999+999×999 |
| ||||||||
2222×
|
▼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,
=(1998+
)÷1998,
=1+
,
=1
;
③999+999×999,
=999×(1+999),
=999×1000,
=999000;
④
×
+0.6+
×
,
=
×(
+1+
),
=
×2,
=
;
⑤2222×
+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.
=(900000-1)+(90000-1)+(9000-1)+(900-1),
=999900-4,
=999896;
②1998
1998 |
1999 |
=(1998+
1998 |
1999 |
=1+
1 |
1999 |
=1
1 |
1999 |
③999+999×999,
=999×(1+999),
=999×1000,
=999000;
④
3 |
5 |
2 |
5 |
3 |
5 |
3 |
5 |
=
3 |
5 |
2 |
5 |
3 |
5 |
=
3 |
5 |
=
6 |
5 |
⑤2222×
29 |
100 |
=1111×(0.29×2+0.09×6-0.04×3),
=1111×(0.58+0.54-0.12),
=1111×1,
=1111.
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