3ϷͶע-
ʹͶע
1ָͶעУ
1ֵ٣“3”ĺֵ14417Ϊʹڽ϶̵ʱнĿ֣ҪѡнʸߵĺֵͶעֵнߵ1011ﵽ1/8912ԽнԽ͡
2ͬ٣Ͷעнߵģﵽ1/7.2ÿ7ھ1ϡ
3ͨѡ٣ͶעнҲܸߣﵽ1/9Ҳֵöʱٵָꡣ
4ͬŸѡ٣ͬŸѡijһӣ3ͨţֻҪ“”뿪е2нͶעнΪ1/13.5ʱǰָƫ
2ָͶע
ǰѾᵽ“ʱ”ʣʱϷԵرҪȻܵͶעнѾȽϸߣҪһнʣѹнʱ䡣“3”ϷҪصһнǿʱ̣Ҫľǰص㷢ӵ£ҪܵĶָͶע
1ֵͶע
A2ֵͶע
ںֵͶעУֵ10ֵ11нߵģﵽ1/8ͬʱ2ֵнʽߵ
1/8+1/8=1/4
൱ƽÿ4ھ1нᣬ2ֵʽ4ԪֻҪеһֵý9ԪӮ5ԪһͶעûУ2ӱͶעɼ4ԪֵһнȻӮ1Ԫ
ֵͬ10+ֵ9ֵ11+ֵ12ͶעҲܴнʣ1/8+1/8.64=1/4.15Ҳ41нᣬеֵ9ֵ12ߵ㡣
B3ֵͶע
ֵ678(ֵ151413)õ٣нʱҲԵе㳤ǿԲð3ֵȫµķнʣнʱ䣬3ֵͶעнΪ
1/10.29+1/14.4+1/21.6=1/4.7
ֵ678(ֵ151413)ĽֱΪ25Ԫ16Ԫ12Ԫ״Ͷע1עʽ6Ԫн2Ͷעӱ1עͶ12Ԫ˿ֵ8ֵ13ƽ֣2ֵӯǰ2ζδн3ͶҪ1Ͷ24Ԫͬ˿ֵ8ֵ13ƽ֣2ֵӯ
е3Ͷע3ֵͬԲ2ַıԡһֵ6ֵ15ӱͶΪ22Ԫ3ֵǸнӯȻͶע24Ԫ22ԪͶע뷽һͬ2ԪѡָͶעѡֵ10нʽ:1/4.7+1/8=1/2.96
ԿѾԭ3ֵͶע4ֵͶעǺֵ10濴ǿʵϽ˳ɱ˷գǽȥ翪ֵ6ֵ15üӱģƶϳŷdzҪ
2ֵͨѡͶע
1ֵ10ͨѡͶע
ֵ10нΪ1/8ͨѡнΪ1/9ͶעнΪ1/8+1/9=1/4.36нDZȽʺٵġҪעǣЩֵͨѡͶעĸʲ㣬ijЩصήнʡ
2ֵ9ͨѡͶע
ֵ9нΪ1/8.64ͨѡнΪ1/9ͶעнΪ1/8.64+1/9=1/4.41濴нʲ͡ϸֵ֣ᷢ9Ѿͨѡе234ص۳صͨѡĸ1/12ͶעнΪ1/8.64+1/12=1/5.02
ͨѡһ4ֱ֣123234345456Ӧĺֱֵ691215ˣ4ֵͨѡͶעӰнʣľֵţǾͿԻ2ݽ С壩
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