【题目】在一个减法算式里,被减数、减数与差相加的和是296,已知差是减数的,题中的减数是 ,差是 .
【答案】96,52
【解析】
试题分析:方法1:296÷2就是被减数,也就是减数与差的和,由于差是减数的,依此列出算式即可求解.
方法2:由题意可知:被减数+减数+差=296;差=减数×;那么被减数=296﹣减数﹣差,即被减数=296﹣减数﹣减数×;根据减法算式各部分的关系可知:被减数﹣减数=差可以写成只含有减法的算式296﹣减数﹣减数×﹣减数=减数×,解这个方程求出减数,进而求出差.
解:方法1:296÷2÷(1+),
=148÷,
=96,
×96=52.
方法2:设减数为X,那么差就是X,被减数就是296﹣X﹣X,则
296﹣X﹣X﹣X﹣X=0,
296﹣X=0,
X=296,
X=96.
X=×96=52.
答:减数是96,差是52.
故答案为:96,52.
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