20×30would equal600.All you have to do is take the two cerca out of the way. Then you multiply2×3and you get6. Then you add the two ceros and get 600.
Ex.: 20×30:20- 0=2+30- 3=2×3=6+00=600
tadah
4, 7-|12|+9=16-12=4
Mark brainliest please
Hope this helps
X+1/3 -+2/4 = x+3/6 = x= - 11/3