解:8+( 7 )等于15 ∵已知8+一个数 = 15 A + B = C,即A = C - B 需求出这个数和搜 ∴设这差戚个数为x 8 + x = 15 x = 15 - 8 唤庆历 x = (10 + 5)- (10 - 2) x = 10 + 5 - 10 + 2 x = (10 - 10)+ (5 + 2) x = 0 + 7∴x = 7 答:8+7等于15
标签:一年级
版权声明:文章由 知识百问 整理收集,来源于互联网或者用户投稿,如有侵权,请联系我们,我们会立即处理。如转载请保留本文链接:https://www.zhshbaiwen.com/answer/300918.html