中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.资阳市2012年财政收入取得重大突破，地方公共财政收入用四舍五入取近似值后为27.39亿元，那么这个数值（ ）
| A: 精确到亿位 |
| B: 精确到百分位 |
| C: 精确到千万位 |
| D: 精确到百万位 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOi/keS8vOaVsOeyvuehruWIsOWTquS4gOS9je+8jOW6lOW9k+eci+acq+S9jeaVsOWtl+WunumZheWcqOWTquS4gOS9jQ==
- 提示2：IDI3LjM55Lq/5pyr5bC+5pWw5a2XOeaYr+eZvuS4h+S9jQ==
- 答案：RA==
PGRpdj7op6PvvJrov5HkvLzmlbDnsr7noa7liLDlk6rkuIDkvY3vvIzlupTlvZPnnIvmnKvkvY3mlbDlrZflrp7pmYXlnKjlk6rkuIDkvY08L2Rpdj48ZGl2PjI3LjM55Lq/5pyr5bC+5pWw5a2XOeaYr+eZvuS4h+S9jTwvZGl2Pg==
本课配套习题挑战模式2/5
单选题
难度系数：
2.由四舍五入得到的近似数0.630，下列说法正确的是（ ）
| A: 精确到百分位，有2个有效数字 |
| B: 精确到千分位，有2个有效数字 |
| C: 精确到百分位，有3个有效数字 |
| D: 精确到千分位，有3个有效数字 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOi/keS8vOaVsOeyvuehruWIsOWTquS4gOS9jeaYr+eci+acgOWQjuS4gOS4quaVsOWtl+aJgOWcqOeahOS9jee9rg==
- 提示2：IOacieaViOaVsOWtl+aYr+S7juW3pui+ueesrOS4gOS4quS4jeaYrzDnmoTmlbDlrZfotbfvvIzlkI7pnaLmiYDmnInnmoTmlbDlrZfpg73mmK/ov5nkuKrmlbDnmoTmnInmlYjmlbDlrZc=
- 提示3：IOacgOWQjuS4gOS4quaVsOWtlzDmiYDlnKjnmoTkvY3nva7mmK/ljYPliIbkvY3vvIzmnIkz5Liq5pyJ5pWI5pWw5a2X77yaNu+8jDPvvIww
- 答案：RA==
PGRpdj7op6PvvJrov5HkvLzmlbDnsr7noa7liLDlk6rkuIDkvY3mmK/nnIvmnIDlkI7kuIDkuKrmlbDlrZfmiYDlnKjnmoTkvY3nva7vvIzmnInmlYjmlbDlrZfmmK/ku47lt6bovrnnrKzkuIDkuKrkuI3mmK8w55qE5pWw5a2X6LW377yM5ZCO6Z2i5omA5pyJ55qE5pWw5a2X6YO95piv6L+Z5Liq5pWw55qE5pyJ5pWI5pWw5a2X77yM5pyA5ZCO5LiA5Liq5pWw5a2XMOaJgOWcqOeahOS9jee9ruaYr+WNg+WIhuS9je+8jOaciTPkuKrmnInmlYjmlbDlrZfvvJo277yMM++8jDA8L2Rpdj4=
本课配套习题挑战模式3/5
单选题
难度系数：
3.用四舍五入法按要求对0.05049分别取近似值，其中错误的是（ ）
| A: 0.1（精确到0.1） |
| B: 0.05（精确到百分位） |
| C: 0.05（精确到千分位） |
| D: 0.050（精确到0.001） |
一次做对，真牛！
+5奖励规则>
- 提示1：IEHpgInpobnnsr7noa7liLAwLjHvvIjljbPljYHliIbkvY3vvInvvIzlj6rpnIDnnIvnmb7liIbkvY0177yM6ZyA6KaB4oCc5LqU5YWl4oCd5omA5Lul57K+56Gu5ZCO5Li6MC4x
- 提示2：IELpgInpobnnsr7noa7liLDnmb7liIbkvY3vvIzlj6rpnIDnnIvljYPliIbkvY0w77yM6ZyA6KaB4oCc5Zub6IiN4oCd5omA5Lul57K+56Gu5ZCO5Li6MC4wNQ==
- 提示3：IEPpgInpobnnsr7noa7liLDljYPliIbkvY3vvIzlj6rpnIDnnIvkuIfliIbkvY0077yM6ZyA6KaB4oCc5Zub6IiN4oCd5omA5Lul57K+56Gu5ZCO5Li6MC4wNTA=
- 提示4：IETpgInpobnnsr7noa7liLAwLjAwMe+8iOWNs+WNg+WIhuS9je+8ie+8jOWPqumcgOeci+S4h+WIhuS9jTTvvIzpnIDopoHigJzlm5voiI3igJ3miYDku6Xnsr7noa7lkI7kuLowLjA1MA==
- 答案：Qw==
PGRpdj7op6PvvJpB6YCJ6aG557K+56Gu5YiwMC4x77yI5Y2z5Y2B5YiG5L2N77yJ77yM5Y+q6ZyA55yL55m+5YiG5L2NNe+8jOmcgOimgeKAnOS6lOWFpeKAneaJgOS7peeyvuehruWQjuS4ujAuMTwvZGl2PjxkaXY+QumAiemhueeyvuehruWIsOeZvuWIhuS9je+8jOWPqumcgOeci+WNg+WIhuS9jTDvvIzpnIDopoHigJzlm5voiI3igJ3miYDku6Xnsr7noa7lkI7kuLowLjA1PC9kaXY+PGRpdj5D6YCJ6aG557K+56Gu5Yiw5Y2D5YiG5L2N77yM5Y+q6ZyA55yL5LiH5YiG5L2NNO+8jOmcgOimgeKAnOWbm+iIjeKAneaJgOS7peeyvuehruWQjuS4ujAuMDUwPC9kaXY+PGRpdj5E6YCJ6aG557K+56Gu5YiwMC4wMDHvvIjljbPljYPliIbkvY3vvInvvIzlj6rpnIDnnIvkuIfliIbkvY0077yM6ZyA6KaB4oCc5Zub6IiN4oCd5omA5Lul57K+56Gu5ZCO5Li6MC4wNTA8L2Rpdj4=
本课配套习题挑战模式4/5
单选题
难度系数：
4.
近似数9.6的准确值a的范围是（ ）
| A: 9.5＜a＜9.7 |
| B: 9.55≤a≤9.65 |
| C: 9.55≤a＜9.65 |
| D: 9.55＜a＜9.65 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+4oCc5Zub6IiN4oCd5b6X5YiwOS4255qE5LiK6ZmQ5pivYSZsdDs5LjY1PGJyPjwvcD4=
- 提示2：PHA+4oCc5LqU5YWl4oCd5b6X5YiwOS4255qE5LiL6ZmQ5pivYeKJpTkuNTU8YnI+PC9wPg==
- 答案：Qw==
PGRpdj7op6PvvJrigJzlm5voiI3igJ3lvpfliLA5LjbnmoTkuIrpmZDmmK9hJmx0OzkuNjXvvIzigJzkupTlhaXigJ3lvpfliLA5LjbnmoTkuIvpmZDmmK9h4omlOS41NTxicj48cCBhbGlnbj0ibGVmdCI+5ZyoOS41NeKJpGHvvJw5LjY16IyD5Zu05YaF55qEYeeahOaVsOe7j+i/h+Wbm+iIjeS6lOWFpeWPr+W+l+WIsDkuNjxicj48L3A+PC9kaXY+
本课配套习题挑战模式5/5
单选题
难度系数：
5.下列说法中，正确的是（ ）
| A: 近似数5百与500的精确度是相同的 |
| B: 近似数5.05是精确到0.01的数，它有3个有效数字 |
| C: 近似数55.0与55是一样的 |
| D: 近似数5.05是精确到百分位的数，它的有效数字是5和0 |
一次做对，真牛！
+5奖励规则>
- 提示1：IEHpgInpobk155m+57K+56Gu5Yiw55m+5L2N77yMNTAw57K+56Gu5Yiw5Liq5L2N
- 提示2：IEPpgInpobnov5HkvLzmlbA1NS4w57K+56Gu5Yiw5Y2B5YiG5L2N77yMNTXnsr7noa7liLDkuKrkvY0=
- 提示3：IETpgInpobnov5HkvLzmlbA1LjA15piv57K+56Gu5Yiw55m+5YiG5L2N55qE5pWw77yM5a6D55qE5pyJ5pWI5pWw5a2X5pivNeOAgTDlkow1
- 答案：Qg==
PGRpdj7op6PvvJogQemAiemhuTXnmb7nsr7noa7liLDnmb7kvY3vvIw1MDDnsr7noa7liLDkuKrkvY08L2Rpdj48ZGl2PkPpgInpobnov5HkvLzmlbA1NS4w57K+56Gu5Yiw5Y2B5YiG5L2N77yMNTXnsr7noa7liLDkuKrkvY08L2Rpdj48ZGl2PkTpgInpobnov5HkvLzmlbA1LjA15piv57K+56Gu5Yiw55m+5YiG5L2N55qE5pWw77yM5a6D55qE5pyJ5pWI5pWw5a2X5pivNeOAgTDlkow1PC9kaXY+
