Question

求下面问题的简便计算！ 没有简便计算帮忙一下脱式计算……谢谢了……

17.8/(1.78*4) 6.3+4.82+3.7-0.82 48.4+2.78+51.6-0.48

333*334+999*222 2.22*9.9+6.66*6.7 最后两题必须简便计算谢了，求大神撒……祝您们中秋快乐！

Answer 1

17.8/(1.78*4)
=17.8/1.78*1/4
=10/4
=2.5

6.3+4.82+3.7-0.82
=（6.3+3.7）+（4.82-0.82 ）
=10+4
=14

48.4+2.78+51.6-0.48
=（ 48.4+51.6）+（2.78-0.48 ）
=100+2.3
=102.3

333*334+999*222
= 333*334+333*3*222
=333*334+333*666
=333*（334+666）
=333*1000
=333000

2.22*9.9+6.66*6.7
=2.22*3*3.3+6.66*6.7
=6.66*3.3+6.66*6.7
=6.66*（3.3+6.7）
=6.66*10
=66.6

希望能帮助你，数学辅导团为您解答，不理解请追问，理解请及时采纳！(*^__^*)

Answer 2

同样祝你中秋快乐
17.8/(1.78*4)
=1/4
6.3+4.82+3.7-0.82 =(6.3+3.7)+(4.82-0.82)
=10-4
=6
48.4+2.78+51.6-0.48
=(48.4+51.6)+(2.78-0.48)
=100+2.3
=102.3

333*334+999*222
=333×334+333×3×222
=333×(334+3×222)
=333×(334+666)
=333×1000
=333000
2.22*9.9+6.66*6.7
=2.22×3×3.3+6.66×6.7
=6.66×3.3+6.66×6.7
=6.66×(3.3+6.7)
=6.66×10
=66.6

Answer 3

17.8/(1.78*4) =(17.8/1.78)/4=10/4=2.5
6.3+4.82+3.7-0.82=(6.3+3.7)+(4.82-0.82)=10+4=14
48.4+2.78+51.6-0.48=(48.4+51.6)+(2.78-0.48)=100+2.3=102.3
333*334+999*222=333*334+333*3*222=333*(334+666)=333*1000=333000
2.22*9.9+6.66*6.7=6.66*(3.3+6.7)=6.66*10=66.6

Answer 4

17.8/(1.78*4)
=17.8/1.78/4
=10/4
=5/2

6.3+4.82+3.7-0.82
=(6.3+3.7)+(4.82-0.82)
=10+4
=14

48.4+2.78+51.6-0.48
=48.4+51.6+(2.78-0.48)
=100+2.3
=102.3

333*334+999*222
=333*334+333*666
=333*(334+666)
=333*1000
=333000

2.22*9.9+6.66*6.7
=2.22*9.9+2.22*20.1
=2.22*(9.9+20.1)
=2.22*30
=66.6
2.22*9.9+6.66*6.7

追问

这个挺不错，…………

Answer 5

333*334+999*222=333*(334+666)=333*1000=333000
2.22*9.9+6.66*6.7=6.66*(3.3+6.7)=6.66*10=66.6