A baker’s ten: subtracting by groups of ten

Bake me a cake as fast as you can. Roll it, pat it, mark it with a TEN. Today we're helping out at a bakery and people are buying so many baked goods! In this lesson, we learn to subtract by groups of ten. Using a place value chart, students subtract larger numbers by focusing on the tens place and taking groups of ten away. It looks like I bought too many croissants: 10, 20, 30... uh-oh.

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Place Value - 1st grade