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Question
Try writing the break-up for these.
19 = ___ + 9
Options
10
12
11
9
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Solution
19 = 10 + 9
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Now act out the story in class.
Simple! I used these cards. I counted one rat and kept one 
card in my pocket.
for one rat.
for Two rats.
for How many rats?
I counted one rat and kept one card in my pocket.
for one rat.
When I had 10 cards, I changed it with this card 
in my pocket.
Which cards will he have in his pocket if he has counted up to
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for one rat.
When I had 10 cards, I changed it with this card in my pocket.
Which cards will he have in his pocket if he has counted up to
55
I counted one rat and kept one card in my pocket.
for one rat.
When I had 10 cards, I changed it with this card in my pocket.
Which cards will he have in his pocket if he has counted up to
80
