Question

简便运算，谁会？

1.654322×123456－654321×123455＝
2.499×501＝
3.999＋99＋9＋4＝

8 7 1
4.—×（— - —）＝
9 16 4

5 4
5.48×—＋21×—＝
8 7

呵呵，貌似看起来不简单诺！麻烦各位最好详细地写出计算过程啊！~最好会说的说清楚一点啊。
写错啦。。
第4题是九分之八×（十六分之七－四分之一）
第5题是48×八分之五＋21×七分之四
不知道会不会看不懂额- -

Answer 1

.654322×123456－654321×123455
＝明正灶654322×(123455+1)－清颂(654322-1)×123455
=654322×123455+654322-654322×123455+123455
=654322-123455=777777
2.499×501＝激扮(500-1 )(500+1)=500^2-1
=250000-1=249999
3.999＋99＋9＋4＝1000-1+ 100-1+10-1+4=1111

Answer 2

你给那么多题
而且知慎差又没分
还要写过程！！！！
找加减乘除都要半天。。。。
晕倒！
天下，是没搭皮有白吃的饭。。。。
小孩子。孝歼
这钱是来之不易的。

Answer 3

1.654322×123456－654321×123455
=(654321-1)×123456-654321×123455
=654321×123456-1×123456-654321×123455
=654321×(123456-123455)-123456
=654321-123456
=530865

2.499×501
=(500-1)×(500+1)
=500^2-1^2
=250000-1
=249999

3.999＋99＋9＋4
=(1000-1)+(100-1)+(10-1)+4
=(1000+100+10)+(4-1-1-1)
=1110+1
=1111

4.(8/9)×(7/16-1/举闹4)
=(8/9)×(7/16)-(8/9)×(1/4)
=7/18-2/9
=7/18-4/18
=3/18
=1/前答卖6

5.48×(5/慧逗8)+21×(4/7)
=6×5+3×4
=30+12
=42

Answer 4

1.654322×123456－告哗姿654321×123455＝ (654321+1)*123456-654321*(123456-1)=654321*123456+123456-654321*123456+654321=7777777

2.499×501＝袜绝芦扮(500-1)*(500+1)=500*500-1*1=249999

3.999＋99＋9＋4＝ (999+1)+(99+1)+(9+1)+1=1111

下面的题目看不懂哟

Answer 5

1.654322×123456－654321×123455
=(654321-1)×123456-654321×123455
=654321×123456-1×123456-654321×123455
=654321×(123456-123455)-123456
=654321-123456
=530865

2.499×501
=(500-1)×(500+1)
=500^2-1^2
=250000-1
=249999

3.999＋99＋型搭9＋4
=(1000-1)+(100-1)+(10-1)+4
=(1000+100+10)+(4-1-1-1)
=1110+1
=1111

4.(8/9)×(7/16-1/4)
=(8/9)×(7/16)-(8/9)×(1/4)
=7/18-2/9
=7/18-4/18
=3/18
=1/6

5.48×(5/悄销8)+21×(4/卜运拿7)
=6×5+3×4
=30+12
=42

别的我什么也看不懂