第 1 页:练习题 |
第 3 页:答案及解析 |
1.11338×25593的值为:
A.290133434
B.290173434
C.290163434
D.290153434
2.甲从A地,乙从B地同时以均匀的速度相向而行,第一次相遇离A地6千米,继续前进,到达对方起点后立即返回,在离B地3千米处第二次相遇,则A,B两地相距多少千米?
A.10
B.12
C.18
D.15
3.从一瓶浓度为20%的消毒液中倒出2/5后,加满清水,再倒出2/5,又加满清水,此时消毒液的浓度为:
A.7.2%
B.3.2%
C.5.0%
D.4.8%
4.某次考试100道选择题,每做对一题得1.5分,不做或做错一题扣1分,小李共得100分,那么他答错多少题?
A.20
B.25
C.30
D.80
5.从一楼走到五楼,爬完一层休息30秒,一共要210秒,那么从一楼走到7楼,需要多少秒?
A.318
B.294
C.330
D.360
6.1,5,10,15,( )
A.16 B.20 C.25 D.30
7.6,9,( ),24,36
A.10 B.11 C.13 D.15
8.115,110,106,103,( )
A.102 B.101 C.100 D.99
9.4,9,16,25,( )
A.18 B.26 C.33 D.36
10.34,2l,35,20,36,( )
A.19 B.18 C.17 D.16
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