28*55-28+28*46簡算
28*55-28+28*46
=28*55-28*1+28*46
=28*(55-1+46)
=28*100
=2800
18×25%+4分之1×60+42×0.25(能簡算的要簡算)
18×25%+4分之1×60+42×0.25
=18*1/4+1/4*60+42*1/4
=1/4*(18+60+42)
=1/4*120
=30
希望對你有用,加油
(0.25+3分之1)×(1.6÷5分之4)的簡算?
(0.25+3分之1)×(1.6÷5分之4)
=(1/4+1/3)x8/5÷5/4
=(1/4+1/3)x8/4
=7/12x2
=7/6