竖式计算(带★的要验算).536÷4900÷5424÷7★826÷8.
19-4= 19-6= 16-5= 16-4= 16-0= 16-2=
7+2= 2+5= 12+5= 11+1= 7+3= 12+1=
5+2= 5+4= 15+1= 11+5= 5+5= 12+3=
12+4= 12+7= 11+4= 12+3= 16+2= 11+6=
13+5= 14+4=