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
答
(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