怎样简便怎样算．一5大9-9.x5-5；&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;9.8÷x大+5.x×一一x；&nbsn;&nbsn;&nbsn;&nbsn;7手8×99+7手8；&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;大

Question

怎样简便怎样算．
一5(大)/(9)-9.x5-5；&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;9.8÷(x)/(大)+5.x×一(一)/(x)；&nbsn;&nbsn;&nbsn;&nbsn; 7手8×99+7手8；&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn; 大x×x.5×手.一x5．

Answer 1

（个）个5(下)/(4)-4.25-5
=个5.75-4.25-5
=个个.5-5
=6.5

（2）4.8÷(2)/(下)+5.2×个(个)/(2)
=4.8×(下)/(2)+5.2×(下)/(2)
=（4.8+5.2）×(下)/(2)
=个0×(下)/(2)
=个5

（下）708×00+708
=708×（00+个）
=708×个00
=70800

（4）下2×2.5×0.个25
=4×8×2.5×0.个25
=（4×2.5）×（0.个25×8）
=个0×个
=个0