0.59×2.3≈(积保留两位小数)
6×4=24 6.6×3.4=22.44 6.66×33.4=222.444
6.666×333.4=
6.6666×3333.4=
1.5+0.7=
5×0.35=
1.7×0.25×4=
5.2÷1.3=
8-0.58=
3.6-3.6÷9=