用竖式计算.35×49850÷14108×52760÷28.
简算:4×0.8×2.5×1.25; 〔(+)÷〕×; 1﹣(﹣)×3;98+99×98; 4.2﹣1.38+5.8﹣3.62; (+)×.
简算:(8.5﹣4)×(0.32÷1.6) (+)×13×18 ×9﹣6÷ ×[1÷(﹣)].
运用运算定律或性质进行简算:(1)26.74﹣(6.74+7.93)(2)(3)125×2.5×3.2.
怎样简便就怎样算.(1)×2+2×(2)101×0.48(3)7.28﹣(1.25+0.28)(4)19.9+19.9×99.
怎样简便就怎样算.3280÷16+600 18.75﹣6.2﹣3.8 25×(100+4) 3.75+4.5÷0.18×0.25 25×32×125 (7.6×15+2.4×5)÷126.