本课配套习题挑战模式1/5
单选题
难度系数:
1.用不等式表示a的一半与2的差大于-1,正确的是( )
A: (a−2)>−1 |
B: a-2>-1 |
C: (a-2)≥-1 |
D: a-2<-1 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWIqeeUqOWFs+mUruaPj+i/sOivreaYr++8muW3ruWkp+S6ji0x77yM6KGo56S65Ye6YeeahOS4gOWNiuS4jjLnmoTlt67vvIzljbPlj6/lvpflh7rnrZTmoYgu
- 答案:Qg==
6Kej77ya5qC55o2u6aKY5oSP77yM5b6XPGltZyB3aWR0aD01IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzAwLzBDL3JCQUNGRk5zU2RuQ2Z1b29BQUFCR2FqMnNOUTgwMC5wbmciPmEtMu+8ni0xLiA8YnI+5pWF6YCJ77yaQi4g
本课配套习题挑战模式2/5
单选题
难度系数:
2.下列说法错误的是( )
A: a是负数,则写作a<0 |
B: a与b的积小于0,则写作ab<0 |
C: b不小于0,则写作b≥0 |
D: x不小于y,则写作x≤y |
一次做对,真牛!
+5奖励规则>
- 提示1:IOaYr+i0n+aVsOWwseaYr+Wwj+S6jjDnmoTmhI/mgJ3vvIzkuI3lsI/kuo7nmoTmhI/mgJ3vvIzlsLHmmK/lpKfkuo7nrYnkuo4u
- 答案:RA==
6Kej77yaQeOAgWHmmK/otJ/mlbDvvIzliJnlhpnkvZxh77ycMO+8jOaVheacrOmAiemhueS4jeespuWQiOmimOaEj++8mzxicj5C44CBYeS4jmLnmoTnp6/lsI/kuo4w77yM5YiZ5YaZ5L2cYWLvvJww77yM5pWF5pys6YCJ6aG55LiN56ym5ZCI6aKY5oSP77ybPGJyPkPjgIFi5LiN5bCP5LqOMO+8jOWImeWGmeS9nGLiiaUw77yM5pWF5pys6YCJ6aG55LiN56ym5ZCI6aKY5oSP77ybPGJyPkTjgIF45LiN5bCP5LqOee+8jOWwseW6lOivpeaYr+Wkp+S6juetieS6jnnvvIzlupTorrDkvZx44omleS4g5omA5Lul5pys6YCJ6aG556ym5ZCI6aKY5oSPLiA8YnI+5pWF6YCJRC4g
本课配套习题挑战模式3/5
单选题
难度系数:
3.一个数x的与-4的差不小于这个数的2倍加上5所得的和,则可列不等式为( )
A: x-4>2x+5 |
B: x+4>2x+5 |
C: x-4≥2x+5 |
D: x+4≥2x+5 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOeQhuino+WFs+mUruivjeivre+8muS4jeWwj+S6jueahOaEj+aAneaYr+Wkp+S6juaIluetieS6ju+8m+S4ji0055qE5beu5piv5YeP5Y67LTTlrp7pmYXnrYnkuo7liqDkuIo0Lg==
- 答案:RA==
6Kej77ya5qC55o2u6aKY5oSP77yM5b6XPGltZyB3aWR0aD01IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzAwLzBDL3JCQUNGRk5zU2VHeHdFN3NBQUFCSG9Gd3pRczY1Mi5wbmciPngrNOKJpTJ4KzUuIDxicj7mlYXpgIlELiA=
本课配套习题挑战模式4/5
单选题
难度系数:
4.小明身高1.5米,小明爸爸身高1.8米,小明走上一处每级高a米,共10级的平台说:“爸爸,现在两个你的身高都比不上我了!”由此可得关于a的不等式是( )
A: 1Oa>1.8×2 |
B: 1.5+a+10>1.8×2 |
C: 10a+1.5>1.8×2 |
D: 1.8×2>10a+15 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruWwj+aYjueahOi6q+mrmCsxMOe6p+mrmOWPsOeahOmrmOW6pu+8nueIuOeIuOi6q+mrmOeahDLlgI3liJflvI/ljbPlj68u
- 答案:Qw==
6Kej77ya5qC55o2u6aKY5oSP77yM5b6XMTBhKzEuNe+8njEuOMOXMi4gPGJyPuaVhemAie+8mkMuIA==
本课配套习题挑战模式5/5
单选题
难度系数:
5.有盐水84kg,含盐12%,为使盐水含盐不低于24%,至少应加盐多少千克设应加盐x(kg),由题意列不等式为( )
A: 84×12%+x≥(84+x)×24% |
B: (84-x)×12%>(84+x)×24% |
C: (84+x)×12%≤84×24%+x |
D: 84×12%+x>(84+x)×24% |
一次做对,真牛!
+5奖励规则>
- 提示1:DQrmtonlj4rlhazlvI/vvJrnuq/nm5DnmoTotKjph48955uQ5rC06LSo6YePw5fmtZPluqYu
- 提示2:DQrkuI3nrYnlhbPns7vvvJrnm5DmsLTlkKvnm5DkuI3kvY7kuo4yNCXvvIzljbPnuq/nm5DnmoTotKjph4/kuI3kvY7kuo7mgLvotKjph4/nmoQyNCUu
- 答案:QQ==
6Kej77ya5qC55o2u6aKY5oSP77yM5b6XPGJyPjg0w5cxMiUreOKJpe+8iDg0K3jvvInDlzI0JTxicj7mlYXpgIlBLiA=