Wyoming Math 1.NBT.1d
The Standard
Extend the number sequences to 120. In this range: Represent a number of objects with a written numeral.
2023 Wyoming Mathematics Content and Performance Standards · Extend the counting sequence.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students continue counting to 120, including from 99 to 100 and 109 to 110. They count objects and write the matching numeral.
What Mastery Looks Like
- A student can count 10 groups of ten and 8 single objects, then write 108. They can fill in missing numbers in a sequence such as 98, 99, 100, 101.
Common Misconceptions
- Some students write 1006 for 106 or say 110 after 99. Others count a bundle of ten as one object instead of ten.
How to Assess It
- Show 10 bundles of ten craft sticks and 7 single sticks. Ask students to write the total, then fill in 118, 119, __.
Lesson moves
Ways to Teach It
Give pairs 11 bundles of ten craft sticks and 4 single sticks; have them count the sticks and write 114.
Write 98, 99, __, 101 on the board and ask students what changes after 99.
Play Missing Number with strips such as 107, 108, __, 110; students write the missing numeral on mini whiteboards.
Set out 10 cups with 10 paper clips each and 6 loose clips; students count them and label the supply bin 106.
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Printable 1.NBT.1d Worksheet
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