Ex.: 1
a). 12x3:4+10-9 = 36:4+10-9 = 9+10-9 = 19-9 = 10
b). (24+17)x(600-592) = 41x8 = 328
c). 200-(13x2+26)+2-1 = 200-(26+26)+2-1 = 200-52+2-1 = 150-1 = 149
d). (100-21x3)x5+2 = (100-63)x5+2 = 37x5+2 = 185 +2 = 187
e). 10x(24+14-38) = 10x(38-38) = 10x0 = 0
f). 10x(5+4x5-20) = 10x(5+20-20) = 10x(25-20) = 10x5 = 50
Ex.: 2
a). [(144x6)+(144:6)]:2 = (864+24):2 = 888:2 = 444
b). [(12+23)x(60-43)]x3 = (35x17)x3 = 52x3 = 156
c). (135x6)-[(300:5):4] = 810-(60:4) = 810-15 = 795
d). (13+87):(100-90) = 100:10 = 10