Key Idea1 of 3
A Ten and Some Ones
Every teen number is built from one group of ten plus some extra ones. The number 14 is one ten and four ones. The number 17 is one ten and seven ones. Knowing this helps us understand how numbers work!
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Math — Counting to 20
Every teen number is built from one group of ten plus some extra ones. The number 14 is one ten and four ones. The number 17 is one ten and seven ones. Knowing this helps us understand how numbers work!