如题所述
第1个回答 2016-03-10
999×718+333×666
=999×718+333×3×222
=999×(718+222)
=(1000-1)×940
=940000-940
=939060追问
=999×718+333×3×222
=999×(718+222)
=(1000-1)×940
=940000-940
=939060追问
乘2乘222是怎么回事?
是乘3
追答666=3×222
本回答被提问者采纳第2个回答 2016-03-10
=333(3×718+666)
=333×3(718+222)
=999×2(359+111)
=1998×470
=(2000 - 2)×470
=2000×470 - 2×470
=940000 - 940
=939060
=333×3(718+222)
=999×2(359+111)
=1998×470
=(2000 - 2)×470
=2000×470 - 2×470
=940000 - 940
=939060