Question

能简算就简算！

Answer 1

 

追答

求采纳

Answer 2

=0.78乘1+99乘0.78
=0.78乘（1+99）
=0.78乘100
=78

Answer 3

0.78+99×0.78
=（99+1）×0.78
=100×0.78
=78

Answer 4

0.78+99X0.78
=（1+99）X78
=78

追答

0.78+99X78
=（1+99）X78
=100X78
=78

Answer 5

0.78x99＋1
100x0.78
78

Answer 6

0.78×（1+99）
＝78