[(20×10+20×2+10×2)×2-20×10]÷(0.2×0.2),
=[(200+40+20)×2-200]÷0.04,
=(260×2-200)÷0.04,
=(620-200)÷0.04,
=320÷0.04,
=8000(块);
答:一共需要8000块这样的瓷砖.
[(20×10+20×2+10×2)×2-20×10]÷(0.2×0.2),
=[(200+40+20)×2-200]÷0.04,
=(260×2-200)÷0.04,
=(520-200)÷0.04,
=320÷0.04,
=8000(块);
答:一共需要8000块这样的瓷砖.