简算 ①56×(﹣+)②32×1.25×0.25 ③78.9×99+78.9④57.2﹣0.4﹣11.6.
脱式计算,能简算的要简算 9.81×0.1+0.5×98.1+0.049×9812÷[(2﹣1.2)×+0.05] 100﹣32×0.125×0.25 [1﹣(﹣)]×.
用简便方法计算(写出简算过程) ①(++)×12②18.93﹣6﹣3 ③163×﹣0.75×62﹣75%④7÷+1×2.
直接写出得数 0.9+99×0.9×2÷×236×25%1.25×3.2×8+0.75 ( +)×4.1×10.1 390×2%×10÷10%+0.6+30%
计算,能简算的要简算. 95.6×1.8+0.18×4454.2﹣+4.8﹣ (+)×13×29×+×﹣.