直接写出得数.
| 73-37= | 38+45= | 63-5= | 60÷7= | 673-290= | 856-420= |
| 340+470= | 42÷8= | 956-489= | 1000-562= | 1563+563= | 59÷9= |
求未知数X
| x- | 1.25:0.25= | 1- |
| 计算. ①7.5×1.8÷0.15 | ②12.4÷0.8-9.64 | ③7.65×2.4+1.64 |
| ④12.3-10.8÷4.5 | ⑤44.28÷4.1÷0.9+2.5 | ⑥39.87×4.58-29.87×4.58. |
| 73-37= | 38+45= | 63-5= | 60÷7= | 673-290= | 856-420= |
| 340+470= | 42÷8= | 956-489= | 1000-562= | 1563+563= | 59÷9= |
| x- | 1.25:0.25= | 1- |
| 计算. ①7.5×1.8÷0.15 | ②12.4÷0.8-9.64 | ③7.65×2.4+1.64 |
| ④12.3-10.8÷4.5 | ⑤44.28÷4.1÷0.9+2.5 | ⑥39.87×4.58-29.87×4.58. |