简便运算,写出简便的过程:4756—3998= 88×102= 66×33+78×99=财富用完了,但很快会补上去的,
问题描述:
简便运算,写出简便的过程:4756—3998= 88×102= 66×33+78×99=
财富用完了,但很快会补上去的,
答
4756—3
=4756-4000+2
=756+2
=758
88×102
=88*(100+2)
=8
=22*333+78*99
=(22+78)*99
=9900
答
4756—3998
=4756-4000+2
=756+2
=758
88×102
=88*(100+2)
=8800+176
=8976
66×33+78×99
=22*3*33+78*99
=(22+78)*99
=9900