Question

99×78+78的脱式计算

Answer 1

99×78+78
=(99+1)78
=78*100
=7800

Answer 2

99×78+78
=(99+1)×78
=100x78
=7800

Answer 3

=（99+1）×78
=100×78
=7800

Answer 4

99×78+78
=(99+1)×78
=100x78
=7800

Answer 5

=（99+1）×78
=100×78
=7800