Study guide: Build Teen Numbers from Ten and More
Compose and record eleven through nineteen as a full ten and extra ones.
Ideas to explain in your own words
- Teen numbers are more than ten and less than twenty.
- A drawing of a full ten and extra ones can be recorded with a number sentence.
- Sometimes the extra ones and the teen total are shown, but the full group is missing.
- A count label is correct only when it matches the objects.
Useful vocabulary
- ten
- A group containing ten ones.
- extra ones
- Objects beyond the full ten in a teen number.
Watch your reasoning
- Do not count the grouping circle as another object.
- Ten plus six is sixteen, not six.
- The 1 in the teen numeral is not a count of one total object.
- Repairing the label keeps all original marks unchanged.
A worked review example
Draw 13 marks. Circle the first ten and leave three outside. The whole is 13, built from ten and three. The group-circle shows organization, while the three separate extras show how far the number is beyond ten. Count exactly ten marks inside the circle. Do not count the grouping circle as another object. Draw a ten-frame and then the extra marks outside it.
Make a practice plan
- Find a Full Ten Inside a Teen Group: Build 19 as ten and extras. Expected: nine extra ones.
- Write Ten Plus the Extra Ones: Write a sentence for ten and eight extras. Expected: 10+8=18.
- Complete a Teen Model with a Missing Ten: Complete 18 with eight extras shown. Expected: ten marks in the full group.
- Repair a Teen Label That Does Not Match: Ten and seven extras are labeled 16. Expected correction: 17.