简便运算 146+155+254+45 101*28 999*999+999
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简便运算 146+155+254+45 101*28 999*999+999
简便运算 146+155+254+45 101*28 999*999+999
简便运算 146+155+254+45 101*28 999*999+999
1.=(146+254)+(155+45)=600 2.=(100+1)*28=100*28+1*28=2828 3.=999*999+1*999=(999+1)*999=1000*999=999000