Question

简便计算，求过程

Answer 1

=(3.6-3.2)×2.5
=0.4×2.5
=1

追答

=2.78×(99+1)
=2.78×100
=278

=4×0.13×2.5
=(4×2.5)×0.13
=10×0.13
=1.3

追问

0.67×9.9

追答

=0.67×(10-0.1)
=0.67×10-0.67×0.1
=6.7-0.067
=6.633

Answer 2

（3.6－3.2）×0.25

Answer 3

？

Answer 4

 

Answer 5

 

追答

 

 

 

Answer 6