(1/4)(1)CH3C=CHCH3+HBr | CH3 —>?(2)CH3C=CHCH3+Br2

(1/4)(1)CH3C=CHCH3+HBr | CH3 —>?(2)CH3C=CHCH3+Br2
(1/4)(1)CH3C=CHCH3+HBr | CH3 —>?(2)CH3C=CHCH3+Br2

(1/4)(1)CH3C=CHCH3+HBr | CH3 —>?(2)CH3C=CHCH3+Br2
(1) (CH3)2C=CHCH3 + HBr ----> CH3-CBrCH2CH3
(2) CH3C=CHCH3 + Br2 ----> CH3CBrCHBrCH3

加成反应，1 、 生成 2-溴-2-甲基丁烷（高温生成 2-溴-3-甲基丁烷） 2、 2,3-二溴丁烷

先问一下你的化学式是不是丁炔啊？
如果是的话，化学式应该是CH3CH=CHCH3吧，
由上式来看两个式子都发生的是加成反应，反应式如下：
(1)CH3CH=CHCH3+HBr = CH3CH2CHBrCH3
(2)CH3C=CHCH3+Br2 = CH3CHBrCHBrCH3