75*4.7+14.7*25=?简便方法计算,
问题描述:
75*4.7+14.7*25=?
简便方法计算,
答
75*4.7+14.7*25=75*4.7+(10+4.7)*25
答
720
答
75*4.7+14.7*25
=75*4.7+(10+4.7)*25
=75*4.7+10*25+4.7*25
=(75+25)*4.7+10*25
=100*4.7+10*25
=470+250
=720
答
计算75*4.7+14.7*25=352.5+367.5=720
简便算法:75*4.7+14.7*25
=75*4.7+(10+4.7)*25
=75*4.7+25*4.7+250
=(75+25)*4.7+250
=100*4.7+250
=470+250
=720