Count, compare, and represent whole numbers up to 100, with an emphasis on groups of tens and ones.
Number & Operations
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Recognize numbers to 20 without counting (subitize) the quantity of structured arrangements.
Use concrete representations to describe whole numbers between 10 and 100 in terms of tens and ones.
Read, write, discuss, and represent whole numbers up to 100. Representations may include numerals, addition and subtraction, pictures, tally marks, number lines and manipulatives, such as bundles of sticks and base 10 blocks.
Count forward, with and without objects, from any given number up to 100 by 1s, 2s, 5s and 10s.
Find a number that is 10 more or 10 less than a given number up to 100.