312x4+188x4=(312+188)x4=2000
312x4-188X4=4*(312-188)=4*124=496
312x4+188x4=(312+188)*4=500*4=2000
312*4+188*4=(312+188)*4=500*4=2000
312x4十188x4=(312+188)x4=500x4=2000
简便计算312x4十188x4=(312+188)x4=500x4=2000
312*4+188*4怎么简便运算(1)312*4+188*4=(312+188)x4=(300+12+100+88)x4=(400+100)x4=500x4=2000(2)312*4+188*4=(300+12)x4+(200-12)x4=300x4+200x4+12x4-12x4=(300+200)x4=500x4=2000
4*(312+188)=4*500=2000
312X4十188x4=4x(312+188)=4x500=2000 不懂可追问,有帮助请采纳,谢谢!
(312+188)*4=500*4=2000