Classroom objects and plurals

Rellena los huecos.
Tengo siete - I have seven pencil cases.
Tengo dos - I have two exercise books.
Tengo seis - I have six dictionaries.
Tengo diez - I have ten folders.
Tengo tres - I have three rulers.
Tengo cuatro - I have four rubbers.
Tengo nueve de papel - I have nine sheets of paper.
Tengo cinco - I have five diaries.

Careful now!
Tengo once - I have eleven pencil sharpeners.
Tengo ocho - I have eight pencils.