Mathematics
Counting & Cardinality
Procedural
6–7 yrs
Counting forwards and backwards (age 6+)
向前和向后数数（6岁以上）
Description
Count forwards and backwards in tens from any number (not just multiples of 10)
Mastery Evidence
- Count 7, 17, 27, 37 … from a non-multiple starting point
- Count backwards in tens from 83
- Explain the pattern of adding/subtracting 10
Assessment Prompt
If your child starts at 37 and you ask them to count up in tens, can they say 37, 47, 57, 67 — crossing over into the next hundred without getting stuck?
Prerequisites 2
Counting in 2s
从任意数起以十为单位计数建立在从0开始的十的跳数基础之上
The two digits of a two-digit number
从非十的倍数起以十为单位计数需要理解加10会改变十位上的数字
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