To: Teacher2Teacher Public Discussion
Subject: Re: finger methed to the nines works with subtracting also
Hello Everyone, I wanted to reply to Deanna's nine methed,and let everyone know that this can be done along with subtracting also: "The nine methed is multipling nines with your fingers". as far as I can see it only works for 10-20-30-40-50-60-70-80-90-100' Tip: always drop the number in the tens place to one number lower and don't forget the number, then work with you fingers to get the answer to what your subtracting and the apply both numbers, I hope this makes since Ok, Let try it: 70-6 = All you need to do to find out the answer is turn the 7 in seventy into a 6 then remember this for a little bit, then hold all of your fingers up, fold six fingers down,you should have 4 fingers up and if you put the six with 4 you should have your answer. 70-6=64 Lets try another one: 30-8= Turn the three into a 2 in the number thirty, now remember the two for a little bit, now hold up all of your fingers, fold down eight fingers, you should have 2 fingers up now put the numbers together 30-8=22 this is a eazy way to subtract,and students love it, I hope you can share this with them.
Math Forum Home || The Math Library || Quick Reference || Math Forum Search