问题
计算题
怎样简便就怎样算。 | ||||
|
答案
(1)25×13×4
=25×4×13
=100×13
=1300
=(100-1)×21
=100×21-21
=2100-21
=2079
(3)134+273+266+127
=(134+266)+(273+127)
=400+400
=800
=258+(74+26)
=258+100
=358
怎样简便就怎样算。 | ||||
|
(1)25×13×4
=25×4×13
=100×13
=1300
=(100-1)×21
=100×21-21
=2100-21
=2079
(3)134+273+266+127
=(134+266)+(273+127)
=400+400
=800
=258+(74+26)
=258+100
=358