简便计算分类练习题第一种(300+6)x1225x(4+8)125x(35+8)(12+24+80)×504×(25×65+25×28)84x10132×(25+125)(13+24)x8第二种504x2525×(24+16)78x10225x204704×2588×125102×76101×8799x64999x9999 x27第三种99x1698×19998 x3458×98638x99第四种99X13+1325+199X2532X16+14X32178×99+17879×42+79+79×5775×99+2×7575×27+19×2 578X4+78X3+78X384×36+64×84×870+13×31031第五种88X12572X12575×2412×2525X32X125(13×125)×(3×8)125X32X875×24×(34×4)×3138×25×425×32×12550第六种3600÷25÷48100÷4÷753000÷125÷81250÷25÷5420÷(5×7)7300÷25÷4800÷(20×8)3900÷(39×25)第七种1200-624-762100-728-772273-73-27847-527-2732356-(1356-721)3065-738-10652365-1086-2145001-247-1021-2321235-(1780-1665)2357-183-317-357第八种278+463+22+37732+580+268425+14+186158+262+138375+219+381+225(181+2564)+27191034+780+320+1022214+638+286378+44+114+242+222276+228+353+219(375+1034)+(966+125)(2130+783+270)+1017214-(