Montana Math MT.K.CC.1

MathKindergartenCounting and Cardinality

The Standard

Flexibly count to 100 by ones and by tens.

2026 Montana Mathematics Content Standards

Teacher's field guide

What Students Need to Do: Students say numbers in order to 100 by ones and by tens. They can start partway through a count and keep going without starting over.
What Mastery Looks Like: A student can count by ones from 47 to 62 without skipping 50. They can count 30, 40, 50, and on to 100 without a chart.
Common Misconceptions: Students may jump from 29 to 40 or skip a number in the teens. When counting by tens, some switch to ones after 30 or stop at 90.
How to Assess It: Say 47 and ask students to count by ones to 62. Then say 30 and ask them to count by tens to 100.

Lesson moves

Have students place counters on every tenth number of a hundred chart, then point and count from 47 to 63 by ones.
Point to 49 on a hundred chart and ask students to explain what comes next, then ask what follows 90 when counting by tens.
Play Count and Pass: students pass a beanbag and say the next number, first by ones from 56, then by tens from 40.
Post a 100-book class reading goal; count each stack of ten books by tens, then count loose books by ones.

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$Preview of the MT.K.CC.1 printable worksheet$

A ready-to-print activity worksheet aligned to MT.K.CC.1, with an answer key for the teacher on its own page. No account needed.

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