奧數1 1/4x17+6x12.5+10/8+2x1.25
回答 (4)
2010-11-21 4:59 am
第三個先答對!!!!!!!
2009-04-14 10:54 pm
1/4x17+6x12.5+10/8+2x1.25=
=>1*17/4+6*12.5+10/8+2.5
=>17/4+75+1.25+2.5
=>4.25+75+1.25+2.5
=>4.25+1.25+2.5+75
=>6.5+2.5+75
=>9+75
=>84
=>1*17/4+6*12.5+10/8+2.5
=>17/4+75+1.25+2.5
=>4.25+75+1.25+2.5
=>4.25+1.25+2.5+75
=>6.5+2.5+75
=>9+75
=>84
2009-04-13 6:22 am
1 1/4x17+6x12.5+10/8+2x1.25
=1.25x17+6x12.5+1.5+2x1.25
=1.25x17+60x1.25+1.25+0.25+2x1.25
=(17+60+1+2)x1.25+0.25
=80x1.25+0.25
=(8x1.25)x10+0.25
=10x10+0.25
=100+0.25
=100.25
=1.25x17+6x12.5+1.5+2x1.25
=1.25x17+60x1.25+1.25+0.25+2x1.25
=(17+60+1+2)x1.25+0.25
=80x1.25+0.25
=(8x1.25)x10+0.25
=10x10+0.25
=100+0.25
=100.25
參考: Me
2009-04-13 12:50 am
1 1/4x17+6x12.5+10/8+2x1.25
=5/4 x17 + 6x25/2 +5/4+2x 5/4
=85/4+300/4+5/4+10/4
=(1/4)(85+300+5+10)
=(1/4)(400)
=100//
=5/4 x17 + 6x25/2 +5/4+2x 5/4
=85/4+300/4+5/4+10/4
=(1/4)(85+300+5+10)
=(1/4)(400)
=100//
收錄日期: 2021-04-13 16:33:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090412000051KK01073