8/9÷1/2+8/9÷1/3=8/9×2+8/9×3=8/9×(2+3)=40/9
8/9÷1/2+8/9÷1/3=8/9×2+8/9×1/3=8/9×(2+3)=8/9×5=40/15
8/9÷1/2+8/9÷1/3=8/9*2+8/9*3=8/9*5=40/9