等式和方程的含义
1. 等式:90-x=30,80÷4=20,7y=63
20+30=50, y+17=38, 54÷x=9;
方程:90-x=30, 7y=63, y+17=38, 54÷x=9。
2.30+ x=80; 4 x=80;
x+10=50, 3 x=20+50
3.52+ x=110;
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1. 等式:90-x=30,80÷4=20,7y=63
20+30=50, y+17=38, 54÷x=9;
方程:90-x=30, 7y=63, y+17=38, 54÷x=9。
2.30+ x=80; 4 x=80;
x+10=50, 3 x=20+50
3.52+ x=110;
http://m.ksjqmj.com/wunianjidaan/2322.html
推荐访问