计算下面各题.(1)递等式计算:36÷〔(﹣)×3〕(2)解方程:17.5﹣5(x+0.5)="9x" (3)简便计算:(87.2+87.2+87.2×2)×25 765×213÷27+765×327÷27.
用适当的方法解答下题4.85×0.17+0.485×8.3 .
8.1×1.3﹣8×1.3+1.9×1.3+11.9÷1.36.
脱式计算,能简算的要简算.60÷15+2.5×1.9 ×[÷(﹣)] ++﹣0.65×8.7+6.5×0.23﹣0.65 .
脱式计算,能简算的要简算①2.9×1.4+2×1.6 ②(2.44﹣1.8)÷0.4×20 ③4.6×9+4.6.
能简算的要简算.①6.75×2.4+4.25×2.4﹣2.4 ②2004×.