如题所述
解:666-111+89等于( 644 )
∵已知需求出666-111+89等于多少
∴666 - 111 + 89
= (600 + 66)- (100 + 11)+ (100 - 11)
= 600 + 66 - 100 - 11 + 100 - 11
= (600 - 100 + 100)+(66 - 11 - 11)
= (500 + 100)+(55 - 11)
= 600 + 44
= 644
答:666-111+89等于644
∵已知需求出666-111+89等于多少
∴666 - 111 + 89
= (600 + 66)- (100 + 11)+ (100 - 11)
= 600 + 66 - 100 - 11 + 100 - 11
= (600 - 100 + 100)+(66 - 11 - 11)
= (500 + 100)+(55 - 11)
= 600 + 44
= 644
答:666-111+89等于644
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第1个回答 2020-02-19
666-111+89
=555+(100-11)
=555+100-11
=655-11
=644
=555+(100-11)
=555+100-11
=655-11
=644
第2个回答 2020-02-19
666-111+89
=666+100-11-111
=766-11-111
=755-111
=644
=666+100-11-111
=766-11-111
=755-111
=644
第3个回答 2020-02-19
666-111+89
=666-(111+89)
=666-200
=466
望采纳回答,谢谢
=666-(111+89)
=666-200
=466
望采纳回答,谢谢
第4个回答 2020-02-19