Most of us have learned these facts many times. Use this quick drill to refresh your mind—knock off the dust.
- x times y =x times y = xy
- x(y) =x(y) = xy
- x * y =x * y = xy
- x · y =x · y = xy
- 2x(y) =2x(y) = 2xy
- 2x(3y) =2x(3y) = 6xy
- 4x(3y) =4x(3y) = 12xy
- 3x(6y) =3x(6y) = 18xy
- x times xx times x = x2
- x(x) =x(x) = x2
- x(xy) =x(xy) = x2y
- xy(y) =xy(y) = xy2
- x ÷ y =x ÷ y = x/y
- y ÷ x =y ÷ x = y/x
- x ÷ 2 =x ÷ 2 = x/2
- 2 ÷ x =2 ÷ x = 2/x
- x ÷ 3 =x ÷ 3 = x/3
- 3 ÷ x =3 ÷ x = 3/x
- 3x ÷ y =3x ÷ y = 3x/y
- 3x ÷ 2y =3x ÷ 2y = 3x/2y
- 6x ÷ 4y =6x ÷ 4y = 3x/2y
- 4x ÷ 4y =4x ÷ 4y = x/y
- 6x ÷ 3y =6x ÷ 3y = 2x/y
- 4x ÷ 2y =4x ÷ 2y = 2x/y