![]() ![]() ![]() One of the biggest confusions with this sort of exercise. And, you can always think of a '+' in front of a number as meaning 'times +1' and a '-' in front of a number as meaning 'times -1'. Browse keep flip change resources on Teachers Pay Teachers, a marketplace trusted by millions of teachers for original educational resources. In proper mathematical language, Keep Change Flip translates to Dividing by a fraction is equivalent to multiplying by the reciprocal. You can help your students understand how to divide fractions by using fraction strips that they can move around. Let's see if we can figure out what four and four fifthsĭivided by one and one half is and I encourage you to pause the video and see if you canįigure it out on your own and I'll give you a hint, see if you can rewrite these mixed numbers as what is sometimesĬalled improper fractions. Keep Change Flip (KCF) Donna Herron Try a harder problem How to use KCF You use KCF when you have to divide fractions. I had never heard of 'keep, change, flip' before But basically, you are just talking about the fact that (-1)(-1) +1 or, more generally, that the product of two negative numbers is negative. By sixth grade, when students need to divide mixed numbers, they often rely heavily on the multi-step keep-change-flip method that is hard to memorize and understand. ![]()
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