0.68+19.6= = 0.56÷0.4= 0.125×8=
12= 0.22×200= 100﹣0.86= =
526﹣198= 0.32×2.5= n×n= kg:240g=
24×+= 2.6+1.98= -= 1.6÷25%=
÷= ×÷×0=