In the bottom half of the igloo, there are 10 rows / 2 = <<10/2=5>>5 rows of bricks of snow.

So in the bottom half of the igloo, there are 5 rows * 12 bricks of snow in each row = <<5*12=60>>60 bricks of snow.

In the top half of the igloo, there are 5 rows * 8 bricks of snow in each row = <<5*8=40>>40 bricks of snow.

There is therefore a total of 60 + 40 = <<60+40=100>>100 bricks of snow in the igloo.

# Answer

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<|im_start|>system
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<|im_start|>user
Libby is building an igloo in her backyard using bricks of snow. She builds her igloo in rows, using a total of 10 rows of bricks of snow. The bottom half of the igloo has 12 bricks of snow in each row while the top half of the igloo has 8 bricks of snow in each row. How many bricks of snow did Libby use for her igloo?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
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user
100
Libby is building an igloo in her backyard using bricks of snow. She builds her igloo in rows, using a total of 10 rows of bricks of snow. The bottom half of the igloo has 12 bricks of snow in each row while the top half of the igloo has 8 bricks of snow in each row. How many bricks of snow did Libby use for her igloo?
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