Abacus frame in kindergarten

Name: Subtraction Strip
Material: high-quality beech
Weight: 0.65 kg
Size: 31.0*22.5*3.0cm
Packing: white box
Contents: 2 cards, a wooden box, 17 wooden strips, 9 red wooden strips and 9 blue wooden strips.
The board is 12 square by 18 square with numbers 1 to 18 printed on the top. A wooden box contains 9 redwoods and 9 bluewoods, printed with numbers 1 to 9 and 18 natural woods of different lengths. The children use the subtraction bar by selecting a combination of subtractions from 1 to 18, thereby enhancing the child's understanding of the subtraction table.