怎样简便就怎样算(229+329)×29×23713-0.4+613-35（8.26+8.26+8.26+8.26）×2.5（29×35）×9×5．

Question

怎样简便就怎样算
((2)/(29)+(3)/(29))×29×23                
(7)/(13)-0.4+(6)/(13)-(3)/(5)
（8.26+8.26+8.26+8.26）×2.5        
（(2)/(9)×(3)/(5)）×9×5．

Answer 1

（1）((2)/(29)+(3)/(29))×29×23   
=(2)/(29)×29×23+(3)/(29)×29×23
=46+69
=115；

（2）(7)/(13)-0.4+(6)/(13)-(3)/(5)
=(7)/(13)+(6)/(13)-（(2)/(5)+(3)/(5)）
=1-1
=0

（3）（8.26+8.26+8.26+8.26）×2.5
=8.26×4×2.5
=8.26×（4×2.5）
=8.26×10
=82.6

（4）（(2)/(9)×(3)/(5)）×9×5
=（(2)/(9)×9）×（(3)/(5)×5）
=2×3
=6