1) 1/2+3/8*7-8/3 2) 2(3/4-3/4+3/4-3/4)
1) 1/2+3/8*7-8/3= =1/2+21/8-8/3= =4/8+21/8-8/3= =25/8-8/3= =75/24-64/24=11/24 2) 2(3/4-3/4+3/4-3/4)=2*0=0