苏教版一年级数学下册,十几减九,数学游园会,97 =,95 =,98 =,94 =,9 +（ ）=11,16,17,14,13,2,6,9,3,9 +（ ）=15,9 +（ ）=18,9 +（ ）=12,水果店,4,1，,2，,3，,4,9,4,4,4,3,7,？条,3、比一比，算一算,11-9= 14-9= 18-9=,2,5,9,9+2= 9+5= 9+9=,11,14,18,3,1,5,9,2,10,7,4,8,6,2,3,4,5,6,7,8,9,10,2,9,4,5,6,7,8,3,10,119=,129=,139=,149=,159=,169=,179=,189=,199=,你发现了什么？,
