谁能帮我正确的解出下列全部数学题？

Question

1.在横线上填上合适的数，在○中填相应的运算符号。

（1）23X99 (2)68X99
=___○___○___ =___○___○___
=___ =___

(3)48X999 (4)75X998
=___○___○___ =___○___○___○__

(5)63X101 (6)45X102
=___○___○___ =___○___○___○___
=___ =___

2.简便计算(要用综合)

(1)4.6X7+4.6X3 (2)250X36 (3)124X76-76X24

4.比一比,算一算

(1)808X125
=101X(8X125)
=
(2)808X125
=(800+8)X125
=
(3)2.5X32
=2.5X___○___
=
(4)2.5X99
=2.5X___○___
=
(5)125X24
=125○___○___
=
(6)25X96
=25X100○___X___
=

要求答案正确,答案齐全,写答案的时候标上题目编号

Answer 1

（1）23X99
=23X100-23
=2277

(2)68X99
=68X100-68
=6732

(3)48X999
=48X1000-48

4)75X998
=75X1000-75-75

5)63X101
=63X100+63

(6)45X102
=45X100+45+45

2.简便计算
(1)4.6X7+4.6X3
=4.6X（7+3）
=4.6X10
=46

(2)250X36
=250X4X9
=1000X9
=9000

3)124X76-76X24
=（124-24）X76
=100X76
=7600

4.比一比,算一算
1)808X125
=100X(8X125)
= 100X1000
=100000

2)808X125
=(800+8)X125
= 800X125+8X125
=100000+1000
=101000

(3)2.5X32
=2.5X4X8
=10X8
=80

(4)2.5X99
=2.5X100-2.5
=250-2.5
=247.5

(5)125X24
=125X8X3
=1000X3
=3000

6)25X96
=25X100-25X4
=2500-100
=2400

Answer 2

同意凡夫的,都采用简易计算