Yohaku Junior Book 1

Yohaku Junior(TM) is a new type of number puzzle that will test your number sense and problem solving skills. It is based on yohaku puzzles but is aimed at primary-aged students. The puzzles in this book focus on additive thinking and will help students become more efficient with their recall of additive facts. Your task is to fill in the empty cells such that they give the sum shown in each row and column.