Math Humor Singapore Math Videos Video and Quiz: What concept are they missing? susanrm/October 4, 2010/ Leave a comment Watch the video below and see if you can identify which of the concepts Pa and Ma are missing. Then take the quiz below to find out if you identified the concept. /1 Video Quiz Quiz about the Ma and Pa Kettle video. What mistake do both Pa and Ma make when computing? 1 / 1 What mathematical concept were Pa and Ma Kettle missing? The connection between division and fractions. The understanding of the place value of digits in a number. The correct way to add one- and two-digit numbers. Close! Without an understanding of place value, it's easy to make mistakes in division like Pa and Ma Kettle did. In the long division attempt, instead of saying "Five won't go into 2, will it?" they should be looking at the two as 20. Also, long division notation isn't helpful for simple multiplication.Then, when Ma tries to prove her point with multiplication, she uses a partial products approach but fails to multiply 5 by 10 instead of by 1 -- a place value error that can be avoided if we make sure to talk about place value as we multiply and divide. Yes!Without an understanding of place value, it's easy to make mistakes in division like Pa and Ma Kettle did. In the long division attempt, instead of saying "Five won't go into 2, will it?" they should be looking at the two as 20. Also, long division notation isn't helpful for simple multiplication.Then, when Ma tries to prove her point with multiplication, she uses a partial products approach but fails to multiply 5 by 10 instead of by 1 -- a place value error that can be avoided if we make sure to talk about place value as we multiply and divide. Your score is 0% Restart quiz Learn more about these important concepts in my book! Related