口算 23+34= 47+36=" " 55-36= 82-46= 700-370= 790-560= 57-25= 43+38=" " 56-28= 34+54= 290+480= 530-360= 62-36= 45+47=" " 43-27= 95-61= 340+380= 790-560=
6-3= 3+3= 7-5= 5+2=
9-4= 9-5= 4+5=
10-4= 10-6= 4+6=
5+2= 7-5= 7-2=
4+1= 5-1= 5-4=