全一卷
1.计算:
=______ .
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2.循环小数0.0
4285
.的小数部分的前2015位数字之和是______ .
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3.已知a与b的最大公约数是4,a与c、b与c的最小公倍数都是100,而且a≤b.满足条件的自然数a、b、c共有多少组?
4.两位数
和
都是质数,则
有______个.
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5.
,
分别表示两位数和三位数,如果
+
=1079,则a+b+c+d+e=______.
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6.已知三位数
,并且a(b+c)=33,b(a+c)=40,则这个三位数是______.
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