Mathematics
Number Representation & Place Value
Procedural
6–7 yrs
10 More or 10 Less
多10或少10
Description
Mentally find 10 more or 10 less than a given two-digit number without counting
Mastery Evidence
- Given 56, quickly say 66 is 10 more and 46 is 10 less
- Explain that adding 10 increases the tens digit by 1
- Answer '10 more than 73' without using fingers or counting on
Assessment Prompt
Can your child quickly tell you what is 10 more than 43 or 10 less than 71 — without counting up or down one at a time?
