0.4减负1/4再加上1/6,等于多少,急死我啦,

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0.4减负1/4再加上1/6,等于多少,急死我啦,0.4减负1/4再加上1/6,等于多少,急死我啦,0.4减负1/4再加上1/6,等于多少,急死我啦,0.4-(-1/4)+1/6=2/5+1/4+1/

0.4减负1/4再加上1/6,等于多少,急死我啦,
0.4减负1/4再加上1/6,等于多少,急死我啦,

0.4减负1/4再加上1/6,等于多少,急死我啦,
0.4-(-1/4)+1/6 =2/5+1/4+1/6 =24/60+15/60+10/60 =49/60