四道简便计算,..四道:答完了我会忠心感谢你的!1:19.98乘37-199.8乘1.9=1998乘0.822:7.6乘1\2除以{1.9-1.9乘(1.9-1.9)}3:9又1\3+99又1\3+999又1\3+9999又1\3+2又2\34:9.75+99.75+999.75+9999.751:19.98乘37-199.8乘1.9+1
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/01 06:47:22
![四道简便计算,..四道:答完了我会忠心感谢你的!1:19.98乘37-199.8乘1.9=1998乘0.822:7.6乘1\2除以{1.9-1.9乘(1.9-1.9)}3:9又1\3+99又1\3+999又1\3+9999又1\3+2又2\34:9.75+99.75+999.75+9999.751:19.98乘37-199.8乘1.9+1](/uploads/image/z/1260278-62-8.jpg?t=%E5%9B%9B%E9%81%93%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%2C..%E5%9B%9B%E9%81%93%EF%BC%9A%E7%AD%94%E5%AE%8C%E4%BA%86%E6%88%91%E4%BC%9A%E5%BF%A0%E5%BF%83%E6%84%9F%E8%B0%A2%E4%BD%A0%E7%9A%84%211%EF%BC%9A19.98%E4%B9%9837-199.8%E4%B9%981.9%3D1998%E4%B9%980.822%EF%BC%9A7.6%E4%B9%981%5C2%E9%99%A4%E4%BB%A5%7B1.9-1.9%E4%B9%98%EF%BC%881.9-1.9%EF%BC%89%7D3%EF%BC%9A9%E5%8F%881%5C3%2B99%E5%8F%881%5C3%2B999%E5%8F%881%5C3%2B9999%E5%8F%881%5C3%2B2%E5%8F%882%5C34%3A9.75%2B99.75%2B999.75%2B9999.751%EF%BC%9A19.98%E4%B9%9837-199.8%E4%B9%981.9%2B1)
四道简便计算,..四道:答完了我会忠心感谢你的!1:19.98乘37-199.8乘1.9=1998乘0.822:7.6乘1\2除以{1.9-1.9乘(1.9-1.9)}3:9又1\3+99又1\3+999又1\3+9999又1\3+2又2\34:9.75+99.75+999.75+9999.751:19.98乘37-199.8乘1.9+1
四道简便计算,..
四道:答完了我会忠心感谢你的!
1:19.98乘37-199.8乘1.9=1998乘0.82
2:7.6乘1\2除以{1.9-1.9乘(1.9-1.9)}
3:9又1\3+99又1\3+999又1\3+9999又1\3+2又2\3
4:9.75+99.75+999.75+9999.75
1:19.98乘37-199.8乘1.9+1998乘0.82对不起写错了.
四道简便计算,..四道:答完了我会忠心感谢你的!1:19.98乘37-199.8乘1.9=1998乘0.822:7.6乘1\2除以{1.9-1.9乘(1.9-1.9)}3:9又1\3+99又1\3+999又1\3+9999又1\3+2又2\34:9.75+99.75+999.75+9999.751:19.98乘37-199.8乘1.9+1
1.19.98*37-199.8*1.9+1998*0.82
=19.98(37-19+82)=19.98*100=1998
2.7.6*(1/2)÷(1.9-1.9×(1.9-1.9))
=7.6÷2÷1.9=2
3.9又1\3+99又1\3+999又1\3+9999又1\3+2又2\3
=9+(1/3+2/3)+99+(1/3+2/3)+999+(1/3+2/3)+9999+(1/3+2/3)
=10+100+1000+10000
=11110
4.9.75+99.75+999.75+9999.75
=9+99+(0.75+0.25)+999+(0.75+0.25)+9999+(0.75+0.25)
=9+100+1000+10000
=11109