(12十24+80)x50用简便方法计算i
(12十24+80)x50=12×50+24×50+80×50
=600+1200+4000
=5800
绛旓細=12脳50+24脳50+80脳50 =600+1200+4000 =1800+4000 =5800 =
绛旓細鍙互杩欐牱绠渚胯绠楋細
绛旓細(12鍗24+80)x50 =12脳50+24脳50+80脳50 =600+1200+4000 =5800
绛旓細(12鍗24鍗8o)脳5o =12脳50+24脳50+80脳50 =600+1200+4000 =5800
绛旓細涔樻硶鍒嗛厤寰嬨愰噰绾虫槸涓绉嶇編寰枫
绛旓細(12鍗24鍗80)x5 =12x5+24x5+80x5 =60+100+400 =560
绛旓細(12鍗24鍗80)x51000 =116*51000 =116*锛50000+1000锛=5800000+116000 =5916000
绛旓細25x(24鍗12)=25脳锛40-4锛=1000-100 =900
绛旓細绠渚胯绠椾负:12脳50+75脳2 =2脳6脳50+25脳3脳2 =2脳50脳6+25脳2脳3 =100脳6+50脳3 =600+150 =750
绛旓細24X50鍗24x4 =1200+96 =1296