Parts of 100

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Ten-frames aren't just for primary kiddos.  Here's a great activity from Van de Walle for working with parts of 100.

Make an easy little I Can card with directions similar to the following:

I Can...

• Take turns with my partner rolling two number cubes 
• Make a two-digit number from the digits rolled
• Build the number using ten-frames
• Mentally determine on my own, while my partner does the same, what number will combine with the number we created to make 100
• Share my solution with my partner
• Check my work by making the other part using the ten frames
• Record my work in my Math Journal 

So, for example, if they roll a 3 and an 6, they can decide to make 36 or 63.  Assume they choose  36.  They build the number 36 using student ten-frame cards.  Each partner mentally calculates the amount needed to make 100 from 36, and then they share strategies.  One strategy that might be used is adding 4 to 36 to make 40 and then counting by tens to 100.  Another is to skip count forward by 10s from 36 to 96 and then add on the 4 ones.  The students share their strategies, check by building 64 with the ten-frame cards, and record their work.

Download this sheet, copy it on cardstock, laminate it, and cut the cards apart to make a student kit of small ten-frame cards.