Wyoming Math K.CC.4c
The Standard
Understand the relationship between numbers and quantities; connect counting to cardinality. Understand that each successive number name refers to a quantity that is one more, and each previous number name refers to a quantity that is one less.
2023 Wyoming Mathematics Content and Performance Standards · Count to tell the number of objects.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students count a group of objects and tell how the total changes when one is added or taken away. They name the number just after and just before a given number.
What Mastery Looks Like
- Given 7 blocks, a student says 8 is one more and 6 is one less. They show each change by adding or removing exactly one block.
Common Misconceptions
- Some children give the next number when asked for one less. Others say the next number but add two objects instead of one.
How to Assess It
- Give each child 5 counters. Say, 'Show one more than 5. Start over and show one less than 5. How many counters are in each group?'
Lesson moves
Ways to Teach It
Give pairs six counters and a ten-frame. Have them add one, name the new total, then reset and take one away.
Show five dots, then six. Ask, 'What changed, and why did the count go up by one?'
Show a number card from 2 to 9. Call 'one less' or 'one more,' and have children build that number with cubes.
Put six napkins out for six children. Ask how many are needed if one more child joins, or if one child leaves.
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Printable K.CC.4c Worksheet

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