It's Mental Math Monday with Indiana math teacher Angela. How would you mentally calculate 112-18? Please share how you would do it in the comments.
#math #ITeachMath #EduSky
#math #ITeachMath #EduSky
Comments
That's how my brain does it. Breaking it down for anyone who wants to understand that:
"18 is bigger than 12. Let's see how much bigger:
18-12=6
So the answer must be 6 numbers less than 100, which is:
100-6=94".
100-6=94
(Or -12-6)
112-12=100
100-6=94
Oh wait, I'm gonna post this where people can see, better make sure I'm right
94+18 is 100+12, 112
100 + -6 is 94