1.9+19.9+199.9+1999.9+0.4
问题描述:
1.9+19.9+199.9+1999.9+0.4
答
1.9+19.9+199.9+1999.9+0.4=(2-0.1)+(20-0.1)+(200-0.1)+(2000-0.1)+0.4=2+20+200+2000=2222祝学习进步,望采纳谢谢
1.9+19.9+199.9+1999.9+0.4
1.9+19.9+199.9+1999.9+0.4=(2-0.1)+(20-0.1)+(200-0.1)+(2000-0.1)+0.4=2+20+200+2000=2222祝学习进步,望采纳谢谢