Question

18.7-4分之3-3.7-4分之1 的简便计算

Answer 1

加法的交换律

18.7-4分之3-3.7-4分之1

=18.7-3.7-4分之1-4分之3

=18.7-3.7-(4分之1+4分之3)

=15-1

=14

12.75-（6分之5+4分之3)

=12.75-6分之5-4分之3

=12.75-6分之5-0.75

=12.75-0.75-6分之5

=12-6分之5

=6分之67