Question

简便计算 9.7×（2.45--0.41） 34.58×97 101×26.9--1.25×26.9×0.8

Answer 1

9.7×（2.45--0.41）

=9.7*2.04

=9.7*(2+0.04)

=9.7*2+9.7*0.04

=(10-0.3)*2+(10-0.3)*0.04

=20-0.6+0.4-0.012

=20-0.212

=19.788

34.58×97

=34.58*(100-3)

=3458-103.74

=3354.26

101×26.9--1.25×26.9×0.8

=26.9*(101-1.25*0.8)

=26.9*(101-1)

=26.9*100

=2690