问题
计算题
用简便方法计算。
|
答案
(1)原式=965-165+285
=800+285
=1085
=370-300
=70
(3)原式=(243+57)+(91+109)
=300+200
=500
=325-200
=125
(5)原式=808+182+(449+551)
=1000+1000
=2000
=600+78
=678
用简便方法计算。
|
(1)原式=965-165+285
=800+285
=1085
=370-300
=70
(3)原式=(243+57)+(91+109)
=300+200
=500
=325-200
=125
(5)原式=808+182+(449+551)
=1000+1000
=2000
=600+78
=678