The images that I used in making these will be familiar to Montessori children. But there's something there that they may not have seen before and may not be so familiar with. A Tens Frame.
With these cards, Montessori children will compare counting materials and be introduced to the new form of a tens frame, a common format in many educational systems.
Of course you don't need to be in a Montessori classroom to use this work. It fits well in Math Centers, too.
Children will match the quantity and numeral cards and then self-check with the control cards. When they are finished, they may wish to record their work by coloring and writing the accompanying writing exercise.