2468+234+165 1384+(379+163)用简便方法算

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2468+234+1651384+(379+163)用简便方法算2468+234+1651384+(379+163)用简便方法算2468+234+1651384+(379+163)用简便方法算2468

2468+234+165 1384+(379+163)用简便方法算
2468+234+165 1384+(379+163)用简便方法算

2468+234+165 1384+(379+163)用简便方法算
2468+234+165
=2467+1+234+165
=2467+(235+165)
=2467+400
=2867
1384+(379+163)
=1384+379+163
=1384+316+63+163
=(1384+316)+(63+163)
=1800+226
=2026