The 10-frame can be filled with counters, coins, erasers, small toys, and the list goes on.
Steps to solving a problem using a 10-frame: (8 + 5)
1. Fill the 10-frame with counters matching the largest number
2. Use the second addend to fill the ten frame ("make a ten"). The filled 10-frame is the ten. The left over counters will be the number in the ones place.
I use 10-frames as part of my math stations. However, I use egg cartons (with 2 spots cut out) as the 10-frame. It adds a little more interest :-)
From there, the students roll two dice to get the two addends and fill the 10-frame as mentioned above. Last, they have to use "math talk" to describe the problem. An example is written on an index card with the station: ____ + ____ = ___ ten and ___ ones. This makes _____.
I don't know about you, but it is pretty cool to think about how people think! "Making a ten" is totally how my brain operates... didn't realize that until I started teaching mental math!
So help this momma out... :) Your example... am I following you correctly that the answer is 13? 10 and 3 ones = 13?
ReplyDeleteYou're right Shonna! Here's another example with 8 + 7 (This works if you don't have it memorized :-). First you would "make a ten" with the 8 by adding 2 (from the 7). Then you're left with 10 + 5 which is much easier to add. For bigger numbers it would work like this: 27 + 14. First add 3 from the 14 to turn 27 into 30. Then you're left with 30 + 11.
ReplyDeleteThat is how I do mental math, too!
ReplyDelete