150×4=
24×5=
840÷21=
458-199=
27+54÷6=
98-8×6=
(34+26)×30=
34×(45-45)÷43=
105-105÷15=
350÷7-240÷6=
(450×4)÷(A×4)= 450÷(A×5)=