This first Numberblocks puzzle helps little ones learn basic addition and subtraction skills with their friends the Numberblocks. There are 10 addition and 10 subtraction puzzles featuring Zero to Ten. Each Numberblocks addition puzzle and Numberblocks subtraction puzzle has 2 pieces. Match the simple maths question to the correct answer piece to complete the puzzle. Each clever puzzle fits together in a unique way so theres only one right answer. This gives children a sense of achievement as they figure out the answers themselves.