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f郑州外国语小升初数学试卷
一、选择。下面各题给出的答案中,正确的不一定只有一个,请把正确答案的编号字母写在横线上1下面的比中,能A24B75
24:与组成比例的是57
C710D107E
15:27
2一个真分数,把它的分子和分母同时加上同一个不为零的数,所得到的新分数与原分数比较大小是:A原分数大;B原分数小C大小不变D大小没法确定3下面五个数中,最接近1的是A
87
B
89
Bab
C
65
Caba
D
1110
D
E
2931
4a是质数,b是合数。下面的式子中,值一定是合数的为:A3ab
a1÷b2b
E13
5已知:△△△☆,☆☆☆□□,那么△:□是:A29B16C92D326规定:ab3a2b。已知x417,那么x5A7二、1B17C9D19
E36
计算下列各题,能巧算的要用简便方法计算,并写出主要的计算过程
7413210544
2
3921151657
3
521209330591729
4752319
52
5
2244668810101212133557799111113
f三、填空1.两个质数的倒数相加的和的分子是31,和的分母是(
o
)
o
2.某地去年十二份得一天,最高温度是12C摄氏度,最低温度是4C,这一天最低与最高温度相差()C
o
3.右图平行四边形ABCD中,AD10cm,直角三角形BCE中,EC10cm。图中阴影部分面积比三角形EFG的面积大8cm,EG长(4.计算2
20112
)厘米。
32r