计算下列各题,能简算的要简算. 1110÷[56×(2/3-3/7)]= 1999+1999×999= 378+864÷24×7=
问题描述:
计算下列各题,能简算的要简算.
1110÷[56×(
-2 3
)]=3 7
1999+1999×999=
378+864÷24×7=
答
(1)1110÷[56×(
-2 3
)]3 7
=1110÷[56×
]5 21
=1110÷
40 3
=
;333 4
(2)1999+1999×999
=1999+1999×999
=1999×(1+999)
=1999×1000
=1999000;
(3)378+864÷24×7
=378+36×7
=378+252
=630.