问题
填空题
x+x=______;
x×x=______;
x-0.8x=______;
1.2×2y=______.
答案
①x+x=2x;
②x×x=x2;
③x-0.8x=(1-0.8)x=0.2x;
④1.2×2y=2.4y.
故答案为:2x;x2;0.2x;2.4y.
x+x=______;
x×x=______;
x-0.8x=______;
1.2×2y=______.
①x+x=2x;
②x×x=x2;
③x-0.8x=(1-0.8)x=0.2x;
④1.2×2y=2.4y.
故答案为:2x;x2;0.2x;2.4y.