(5分之1+5分之4*8分之1)除以5分之1能簡算的要簡算

(5分之1+5分之4*8分之1)除以5分之1能簡算的要簡算


(1/5+4/5*1/8)1/5 =1/5(1+4/8)1/5 =1+1/2 =1.5



35.48-(9.4-0.52)簡便方法


=35.48-10+0.6+1-0.48
=(35.48-0.48)-10+0.6+1
=26.6



48*48%+0.48*52簡算


48%=0.48
48×48%+0.48×52
=48×0.48+0.48×52
=(48+52)×0.48
=100×0.48
=48



99*0.86+0.86=?要簡算,


99*0.86+0.86
=(99+1)*0.86
=100*0.86
=86