Game Time!

Add these three-digit numbers by rewriting them and stretching out the kitties on the kitty pile! I’ll do the first one for you.

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Let’s Play: This might seem scary at first, but not if we think about our cuddly meowntain. First, we’ll write the numbers on top of each other:

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…and then we stretch the kitties! Since there are 0 tens in 107, it’s a good idea to put a 0 in that spot so we can keep everything straight when we’re adding.

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Next we circle the hundreds together, the tens together, and the ones together, and add ’em together!

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How about that? Meow!

Answer: 839

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(Hint: Stack them up!)

Now let’s practice subtracting big piles of kitties!

Subtract these three-digit numbers by stretching out the kitties on the kitty pile! I’ll do the first one for you.

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Let’s Play: First, let’s rewrite this as a kitty pile:

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Next we’ll stretch these kitties out….

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Then we circle the hundreds together, the tens together, and the ones together, and subtract down!

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Finally, we take the expanded 500 + 20 + 0 and put it back together as 520. Nicely done!

Answer: 520

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(Hint: Stack them first like we did in #1!)

(Answers on page 149.)

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