Express the area of a square with sides of $19$19 cm as a product of two numbers.

Area $=$=$\editable{}\times\editable{}$× cm^{2}

Which of the following expressions are equal to the perimeter of a square with sides of $16$16 cm?

Which of the following expressions are equal to the volume of a cube with sides of $25$25 cm?

Express the surface area of a cube as a sum of the areas of each face.

Generalise the properties of operations with fractional numbers and integers.