□×□+□=□
□×□-□=□
( )×( )=( ) ( )×( )=( )
①53+34=
②76-42=
③19+49=
④78-38-13=
⑤33+26+18=
⑥91-(63+19)=
3×4= 2×6= 20+39= 4×4=
2×3= 5+3= 5×4= 6+4=
2×4+5= 4×3+6= 2×4-4= 2×5-2=
72÷9= 27÷9= 8×7= 63÷9=
81÷9= 6×9= 9×3= 36÷9=
2×3+2= 6×3-4= 3×5+4=
8×2+1= 4×2+3= 3×7-3=
4×3+5= 3×6-4= 4×9-2=
341-29= 5.7+1.24= -0.25= × =
3.2÷80%= ÷ = ×0+ = 12.5×8÷12.5×8=