Self-checking material for learning subtractions up to 20.
One side of the card shows anchor sums, while the other contains mixed sums. The sums have been printed in green and the answers in red.
Place the red card above the card with the sums to hide the answers.
Contents:
- 10 plastic cards
- 4 transparent red plastic cards
- plastic box (8 x 4.5 x 1.8 cm)
