1. 13/2×2/3=13/3(1)13/2-2/3=35/6(3)13/2×(1-2/3)=13/6(4)13/2×2/13=13/3(5)13/2÷(1+1+2/3)×(1+2/3)=13/2÷8/3×5/3=39/16×5/3=65/16(6)(13/2-2/3)÷2+2/3=35/6÷2+2/3=35/12+2/3=43/12
用去5M
还剩2.5M
还剩5M
还剩65/16M
剩下35/12M
