5: (3/4-2/5)÷2
= 7/20÷2
= 7/40(吨)
答:剩下的每天吃7/40吨。6: (a-1/14)×12=12a-3
a-1/4×12=a-3
(a-1/14)×12-(a-1/4×12)
= 12a-3-(a-3)
= 11a
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5: (3/4-2/5)÷2
= 7/20÷2
= 7/40(吨)
答:剩下的每天吃7/40吨。6: (a-1/14)×12=12a-3
a-1/4×12=a-3
(a-1/14)×12-(a-1/4×12)
= 12a-3-(a-3)
= 11a
http://m.ksjqmj.com/liunianjidaan/363.html
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