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Shanghai Branch Edition Junior High School Intelligence Development Newspaper Mathematics Edition AnswerNo. 15 Seventh Grade
(1) Surface: 1. 1,b; 2、D; 3、D; 4、C; 5、D; 6、D; 7、A; 8、D; 9、A; 10、c

Second, 1, 8; 2、 10; 3、3; 4. One half; 5、8; 6、42; 7、 145; 8、 16。

Third, 1, (1), 38; 2, two-thirds; 2、 1; 3、20; 4. Seven tenths.

Fourth, 1, 20; 2、2.

(b) Surface: 1. 1,C; 2、C; 3、A; 4、B; 5、A; 6、C; 7、C; 8、B; 9、A; 10、C .

Second, 1, yue; 2、0; 3, negative 4; 4、6; 5, negative 3; 6、 10、 15、20; 7、 120; 8、230;

Third, 1, (1), 5 of 6 winds; (2), negative1; 2、4; 3、84; 4.A 225,B 75。

Fourth, 1, 7; 2.( 1) Yue; (2)26.