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Qidong middle school exercise book seventh grade first volume math homework 32 to 33 answers
( 13) 1,0,( 14)a = 2 b =- 1 2.5( 15)( 1)& lt; & lt& gt& gt& gt& gt& gt(2)>( 16) 1( 17)a = 10 b = 99

For multiplication, division, addition and parenthesis, -2 -2 +3 or -3 2 +5 or-594-34-9424816322-7152-7 in parentheses should be calculated first.