67+28= 960﹣540= 1.6×5= 7.5+2.7=
= = 53÷100= =
分数
小数
5.2÷0.04= 1.32+0.8= 8 ÷8= 25+7.5=
51.51÷51= + ÷ = 1.5×2÷1.5×2= 149÷30≈