观察算式: += = ﹣= = += = ﹣= = += = ﹣= = (1)从上面的算式中你发现了 . (2)根据你发现的规律填空:+++++= .
( )-34=34 80-( )=71
( )-36=39 36+( )=71
( )+52=96 52-( )=35
( )+41=96 82-( )=55
看图写算式。乘法算式:_______________ 或_____________