算一算。-|(n.A*G'w(U.p:U7^0q(Y4K9}8}
500克+500克=)K.?2k5O8M3V2]+l8x2_克-|(n.A*G'w(U.p:U7^0q(Y4K9}8}
1千克-600克=,H(^9|4S7C4m2O:V5q8]+D克-|(n.A*G'w(U.p:U7^0q(Y4K9}8}
7000克-700克=;Q5w)c6~5a9p+s1D4O(r5l(T)F5\,f克-|(n.A*G'w(U.p:U7^0q(Y4K9}8}
4500克+500克=;A4y9G*j3K*Q)M千克-|(n.A*G'w(U.p:U7^0q(Y4K9}8}
2000克+3千克=.i9U6Z7R4R;M/A-_-Y;n+D千克-|(n.A*G'w(U.p:U7^0q(Y4K9}8}
1900克-900克=;M,_,Y(X;K2`千克-|(n.A*G'w(U.p:U7^0q(Y4K9}8}