I can compose and decompose numbers from 11 to 19 into ten ones and some further ones
Practice problem 1 for K.NBT.1
Practice problem 2 for K.NBT.1
Practice problem 3 for K.NBT.1
Practice problem 4 for K.NBT.1
Practice problem 5 for K.NBT.1
Practice problem 6 for K.NBT.1
Practice problem 7 for K.NBT.1
Practice problem 8 for K.NBT.1
Practice problem 9 for K.NBT.1
Practice problem 10 for K.NBT.1