四年级下册数学列综合算式题80+81382+83+84+85等于多少？ 数学理工学科
\u6570\u5b66 \u7406\u5de5\u5b66\u79d1 \u5b66\u4e60\u7528\u9006\u63a8\u6cd5\uff0c\u5148\u53bb\u5206\u6bcd\uff0c\u4e24\u8fb9\u540c\u4e584\uff081+x\uff09(1+y)(1+z),\u53c8\u56e0\u4e3ax+y+z=1\u5f974+12xzy+8zy+8xz+8xy<=6+3zy+3xy+3zx+6zxy
6zxy+5zy+5xz+5xy<=2
\u53c8\u56e0\u4e3ax,y,z\u662f\u6b63\u6570\uff0cx+y+z=1\u53ef\u77e5x,y,z\u90fd\u662f\u5c0f\u4e8e1\u5927\u4e8e0\u7684\u6570
\u6545xzy,zy,xz,xy\u90fd\u662f\u662f\u767e\u5206\u4f4d\uff0c\u5341\u5206\u4f4d\u7684\u5c0f\u6570,\u7531\u6b64\u53ef\u77e5
1<6zxy+5zy+5xz+5xy<=2
\u6ee1\u8db3\u6761\u4ef6\uff0c\u5373\u6210\u7acb\u3002
\u8fd8\u6709\u5176\u5b83\u7684\u65b9\u6cd5\uff0c\u4f60\u4e5f\u53ef\u4ee5\u8bd5\u7740\u53bb\u63a8\u6572\u3002
\u8fd9\u662f\u7b2c\u4e00\u95ee\uff0c\u4f60\u770b\u770b\u6709\u95ee\u9898\u4e48
80+81+82+83+84+85
=（80+85）×6÷2
=165×3
=495
80+81382+83+84+85
=81714
80十81十82十83十84十85
=（80十85）X3
=165x3
=495
四年级下册数学，列综合算式题，80+81382加83+84+85等于81714,答案是81714
绛旓細80+81+82+83+84+85 =锛80+85锛壝6梅2 =165脳3 =495
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