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| Represent the top number with base ten blocks 5 rods and 2 units= 52 |
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| "More on the floor? Go next door and get some more" Students learned to exchange a rod for its equivalent (10 units). Now there are 4 rods and 12 units=this still equals 52. |
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| Update what the top number looks like since adjusting the base ten blocks. |
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| Subtract the bottom number from the top (Base Ten First). |
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| 39 was taken away. 3 rods and 9 units. |
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| Count what is left! |
