We also are looking at word problems with 'more than' and 'fewer than' such as:
Jacob had 45 fewer marbles than Tom. Tom had 64 marbles. How many did Jacob have?
We have been working on the relationship between adding and subtracting. This was easy when we were doing problems such as 5+6=11, 5+___=11, 11-6=5, etc.
It seems that when we work with larger numbers, some children get confused. There are videos that take you through the process of this. Here is a link to the video.
https://www.youtube.com/watch?v=8kNANxcTmDI (number line)
https://www.youtube.com/watch?v=sH5Fy9xIXPc (proof drawings)
https://www.youtube.com/watch?v=9f6BpMozNSk (expanded method)
https://www.youtube.com/watch?v=x7K7fxaZJnU (addition using number line)
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