dlgcgs
幼苗
共回答了20个问题采纳率:90% 举报
规范的天平称量必须左物右码,本题仅在数字运算的层面上可以进行,不得在实际试验中这样称量.
按照左边=右边来列:
盐=1g+2g+5g
盐=1g+1g+2g+2g+2g
盐=1g+1g+1g+5g
盐+1g=5g+2g+2g
盐+1g=5g+2g+1g+1g
盐+2g=5g+5g(原题做法)
盐+2g=5g+2g+2g+1g
盐+2g=5g+2g+1g+1g+1g
盐+2g+1g=5g+5g+1g
盐+2g+1g=5g+2g+2g+1g+1g
盐+2g+2g=5g+5g+2g
……
够了吧……还能列很多呢……
1年前
1