0.68+19.6= = 0.56÷0.4= 0.125×8=
12= 0.22×200= 100﹣0.86= =
56+44= 0.9×0.6= 20﹣3.7= 8÷100= 2.5×3.5×4=
-= += 10÷= 15×= ×24+24=