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小学数学题20+10-()=这道题怎么做

小学数学题20+10-()=这道题怎么做

2025-03-14 19:10:02

推荐回答（4个）

回答1：

等于多少啊，如果没有数值，哪随便添写一个30以下的数就好，只要结果不为负就行，因为小学生没学负数。

回答2：

根据题意，可列出二元一次方程：
20+10-x=y
30-x=y
所以，x=30-y；y=30-x

回答3：

等于几啊？如果没有得数直接填一个小于30的数就行了呀

回答4：

20+10等于30

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