解ï¼1/40+1/10ï¼1/8
1/40x5=1/8
1-1/8=7/8
7/8÷1/8=7(天)
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2ãä¹éåç¬åè¦10天å®æï¼ä¹éçå·¥ææ¯1/10
3ãç²ãä¹ä¸¤éååçå·¥æï¼1/40+1/10ï¼1/8
4ãç²éå
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1/40x5=1/8
5ãè¿é¡¹å·¥ç¨è¿å©å åä¹å 没åï¼1-1/8=7/8
6ãç²ãä¹ä¸¤éåä½è¿éå¤å°å¤©ï¼
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7/8÷1/8=7(天)
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