5+2/3*(-2 1/2) 2 1/5*1/3+(-3/10):4 1/2
1)5+2/3×(-2 1/2) 17/3×(-2 1/2)=17/3×-5/2=-85/6=-14 1/6 2) 2 1/5×1/3+(-3/10)÷4 1/2 11/5×1/3=11/15 (-3/10)÷4 1/2=-3/10÷9/2=-3/10×2/9=-1/15 11/15+-1/15=-12/15