作业帮2.7*9.9+1.27简便计算
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 18:35:19
2.7*9.9+1.27简便计算
2.7*9.9+1.27简便计算
2.7*9.9+1.27简便计算
2.7*9.9+1.27
＝2.7x9.9+1+0.27
=2.7x9.9+2.7x0.1+1
=2.7x(9.9+0.1)+1
=2.7x10+1
=28
2.7*9.9+1.27
=2.7*9.9+2.7*0.1+1
=2.7*(9.9+0.1)+1
=2.7*10+1
=27+1
=28
原式=2.7*9.9+0.27+1
=2.7*（9.8+0.1）+1
=27+1=28
敬请采纳有不会请追问~
原式=2.7x9.9+1+0.27
=2.7x9.9+2.7x0.1+1
=2.7x(9.9+0.1)+1
=2.7x10+1
=28
＝2.7x9.9+1+0.27
=2.7x9.9+2.7x0.1+1
=2.7x(9.9+0.1)+1
=2.7x10+1
=28