1化简下列各式.(8 13:36:9)

问题描述:

1化简下列各式.(8 13:36:9)
(1)7a+4a-a
(2)27x-9x+0.5x       1
(3)15t-3n+5.5n-2  T
                                  7

(1)7a+4a-a
=(7+4-1)a
=10a
(2)27x-9x+0.5x 1
=(27-9+0.5)x
=18.5x
(3)15t-3n+5.5n-2
=15t+(5.5-3)n-2
=15t+2.5n-2