0.25+13.7*2.5怎样简算
问题描述:
0.25+13.7*2.5怎样简算
答
=0.25(1+137)=138/4=34.5
答
25/100+137/10*25/10
=25/100+25/100*137
=25/100(1+137)
=1/4*138
=34.5
答
2.5*(13.7+0.1)
答
=2.5*0.1+13.7*2.5
=2.5*(13.7+0.1)
=2.5*(12+1+0.8)
=2.5*12+2.5*1+2.5*0.8
=2.5*4*3+2.5+2
=34.5
答
0.25+13.7*2.5
=0.25*(1+137)
=138/4
=34.5
答
0.25+13.7*2.5=0.25(1+137)=0.25*138=34.5
答
把13.7*2.5看成137*0.25,原式为0.25+137*0.25,然后,运用乘法分配率得0.25*(1+137)=0.25*138=34.5, 全都是口算,很简单就得出答案!