(720÷8+21)ⅹ57,怎样简便计算?5
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发布时间:2023-11-07 15:09
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热心网友
时间:2024-12-02 19:39
(720÷8+21)×57
=(90+21)×57
=(100+11)×57
=100×57+11×57
=5700+627
=6327
热心网友
时间:2024-12-02 19:39
(720÷8+21)×57
=(90+21)×57
=111×57
=(100+10+1)×57
=100×57+10×57+1×57
=5700+570+57
=(6000-300)+(600-30)+(60-3)
=6000-300+600-30+60-3
=6000+(600-300)+(60-30)-3
=6000+300+(30-3)
=6300+27
=6327
热心网友
时间:2024-12-02 19:40
先算括号内,再算括号外
=(90+21)×57
=111×57
=100×57+10×57+1×57
=5700+570+57
=6327
热心网友
时间:2024-12-02 19:40
(720÷8+21)x57
=(90+21)x57
=(100+11)x57
=5700+627
=6327