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+3.7-0.8248.4+2.78+51.6-0.48333*334+999*2222.22*9.9+6.66*6.7最后两题必须简便计算谢了,求大神撒

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

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