1、等式定律Properties of Equality,零定律 Property of Zero,0,0,X,4,0,0,=,零定律 Property of Zero,0,0,3,0,0,0,=,等式定律Properties of Equality,等式定律Properties of Equality,零定律 Property of Zero,3,0,undefined,=,3,=,反射律 Reflexive Property,3,等式定律Properties of Equality,等式定律Properties of Equality,a,=,对称律 Symmetric Property,若,
2、b,=,那么,=,a,=,b,=,若,那么,=,代入律 Transitive Property of Equality ( Substitution Principle),又,=,a,若,b,又,b,=,c,a,=,c,等式定律Properties of Equality,=,若,那么,=,又,=,a,若,b,又,d,=,d,加法律 Addition Property of Equality,a + d = b + d,=,+,+,等式定律Properties of Equality,=,若,那么,=,又,=,a,若,b,又,c,=,d,加法律 Addition Property of Equality,a + c = b + d,=,等式定律Properties of Equality,=,若,那么,=,=,a,若,b,乘法律 Multiplication Property of Equality,a x c = b x c,等式定律Properties of Equality,
