Contact us
Choose a category below so we can get back to you as quickly as possible.
把一張邊長五分之二分米的正方形紙對折成長方形,長方形的周長是(2/5×3=6/5)分米,面積是(2/5×2/5÷2=4/50)平方分米.
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.