35×86+21×35-35×8+35 22×26+56×74+26×34 分别用简便算法计算（要过程）快一点,谢谢（对

35×86+21×35-35×8+35
=35×(86+21-8+1)
=35×100
=3500
22×26+56×74+26×34
=22×26+26×34+56×74
=26×(22+34)+56×74
=26×56+56×74
=56×(26+74)
=56×100
=5600