Jawabanmu

2014-07-31T20:56:07+07:00
1. 28*25= 700 (46+235+154) =435 
    700 -435= 265
2. 23*31=713  (14*16*5-31*2)=2178

3. 2688 :16 = 168 * -8 = 160

4.