除以________等于1，________除以
先找出轴对称图形，再按它们的编号填表．
| 图形编号 | 4 | ________ | ________ | ________ | ________ | ________ | ________ |
| 图形名称 | 正三角形 | ________ | ________ | ________ | ________ | ________ | ________ |
| 对称轴的条数 | 3条 | ________ | ________ | ________ | ________ | ________ | ________ |
直接写出得数．
2÷ = | 0.75÷0.25= | 7×60%= | 233-198= | 175-75× = |
 × = | 4- = | 5×23= |  × = | 2× ÷2×= |