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1、 ,68 .,2(2)31,2(1)23,2(3) 32,2(4)39, , ., ,3- 4- ,32+39=, :,23+39=,30+30=60,2+9=11,60+11=71,2- 4- , ,23+31=, ,23+30=53,53+1=54,1- 2- .,1.,53+36,37+54,67-15,34-26,32+46,15+65,46-24,90-45,=89,=91,=52,=8,=78,=80,=22,=45, ,2(1)23,2(2)31,2(3) 32,2(4)39,68-54=,60-50,=10,8-4=,4,10+4,=14,3- 14 .,32-14=,32-1
2、0=22,22-4=18,3- 18 .,32-14,=18,1.,23+65,56-24,47+36,35-26,27+18,56-37,=88,=32,=83,=9,=45,=19,2.,54+28,76+23,48-29,74-16,64+25,33-25,=82,=99,=19,=58,=89,=8, ,35,+12,-28,+33,-42,计算,97-43,52+16,34+56,25+36,44-19,82-48, , ,56+26 43+38 38+49 25+6787-29 56-2743-28 98-29,=82,=81,=87,=92,=58,=29,=15,=69,( )+37=9167-( )=4232+( )=7875-( )=3091-( )=4575-( )=29( )-45=42( )-65=32,54,25,46,45,46,46,87,97,