□×□+□=□或□×□-□=□
52-7= 8+32= 3×5= 5×4-8=
18+3= 36÷6= 64-9= 6×6+5=
4×6= 5÷5= 28+10= 3×4-10=
12-7= 76-20= 6×7= 2×5 + 9=
(在正确答案后面的括号里打“√” )