直接写得数
720×490÷9÷8= = =
= = 5600÷(700÷25)=
12×(7﹣5)= 898+6÷7÷9×21= 144÷2.4+144÷3.6=
2+99+999+9999+99999=
直接写得数
720×490÷9÷8= = =
= = 5600÷(700÷25)=
12×(7﹣5)= 898+6÷7÷9×21= 144÷2.4+144÷3.6=
2+99+999+9999+99999=